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{{Stub}}
{{Infobox Monster
{{Infobox Monster
|name = Great Olm
|name = Great Olm
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|id = 7551
|id = 7551
}}
}}
The '''Great Olm''' (referred to as the '''Guardian in the Deep''' by Xeric's followers) is the final [[boss]] in the [[Chambers of Xeric]] raid. A large, blind, white salamander, it is one of [[Xeric]]'s greatest possessions.
The '''Great Olm''' (referred to as the '''Guardian in the Deep''' by Xeric's followers) is the final boss in the Chambers of Xeric raid. A large, blind, white salamander, it is one of Xeric's greatest possessions.


==Mechanics==
==Mechanics==
===Attacks===
===Attacks===
*'''Standard attacks:''' Olm has two standard attacks: [[Magic]] and [[Ranged]]. The magic attacks are large green orbs, while the ranged attacks are smaller chunks of crystal. Both deal the same amount of damage. Prayer reduces the damage by roughly 75-80%.
*'''Standard attacks:''' Olm has two standard attacks: Magic and Ranged. The magic attacks are large green orbs, while the ranged attacks are smaller chunks of crystal. Both deal the same amount of damage. Prayer reduces the damage by roughly 75-80%.
*'''Spheres:''' Olm randomly picks a sphere (red, green or purple) and sends it at the player. If not blocked, the player will be damaged approximately 50% of their current [[Hitpoints]]. If a [[protection prayer]] was used when the sphere was launched, it is disabled and the player's [[Prayer]] is reduced by 50%. To block the attack, pray accordingly before and as the sphere hits you:
*'''Spheres:''' Olm randomly picks a sphere (red, green or purple) and sends it at the player. If not blocked, the player will be damaged approximately 50% of their current Hitpoints. If a protection prayer was used when the sphere was launched, it is disabled and the player's Prayer is reduced by 50%. To block the attack, pray accordingly before and as the sphere hits you:
**'''Red''' (sphere of aggression): [[Protect from Melee]]
**'''Red''' (sphere of aggression): Protect from Melee
**'''Green''' (sphere of accuracy and dexterity): [[Protect from Missiles]]
**'''Green''' (sphere of accuracy and dexterity): Protect from Missiles
**'''Purple''' (sphere of magical power): [[Protect from Magic]]
**'''Purple''' (sphere of magical power): Protect from Magic


During phases 1-3, Olm also has access to these specific attacks:
During phases 1-3, Olm also has access to these specific attacks:
*'''Crystal Burst:''' Olm throws a crystal seedling under every player in the chamber. A few seconds later, the crystals burst and shove the player to a nearby tile if they are on top of them for heavy damage. The left hand will briefly show a crystal icon when using this attack.
*'''Crystal Burst:''' Olm throws a crystal seedling under every player in the chamber. A few seconds later, the crystals burst and shove the player to a nearby tile if they are on top of them for heavy damage. The left hand will briefly show a crystal icon when using this attack.
*'''Lightning:''' Shoots out lightning running north and/or south of the chamber. Getting hit by a bolt of lightning electrocutes the player, disabling their [[overhead prayers]], dealing moderate damage, and binding them. The left hand will briefly show a lightning bolt when using this attack.
*'''Lightning:''' Shoots out lightning running north and/or south of the chamber. Getting hit by a bolt of lightning electrocutes the player, disabling their overhead prayers, dealing moderate damage, and binding them. The left hand will briefly show a lightning bolt when using this attack.
*'''Swap:''' Olm will perform a teleport attack that deals damage the further the player is from the target. The left hand briefly shows a swirl when using this attack. If alone, Olm will pick a random tile anywhere in the chamber; if there are more players in the room, Olm will evenly distribute the amount of teleports. If there is an odd-numbered amount of people inside, then those people will not be subjected to the attack.
*'''Swap:''' Olm will perform a teleport attack that deals damage the further the player is from the target. The left hand briefly shows a swirl when using this attack. If alone, Olm will pick a random tile anywhere in the chamber; if there are more players in the room, Olm will evenly distribute the amount of teleports. If there is an odd-numbered amount of people inside, then those people will not be subjected to the attack.


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*'''Flame:'''
*'''Flame:'''
**'''Deep Burn:''' Olm shoots out a green fireball at a player, causing them to yell "Burn with me!". The targeted player takes 5 damage every few ticks, dropping stats by 2 each time this occurs for six hits. If it spreads to other players, the timer resets and newly infected players will initially yell "I will burn with you."
**'''Deep Burn:''' Olm shoots out a green fireball at a player, causing them to yell "Burn with me!". The targeted player takes 5 damage every few ticks, dropping stats by 2 each time this occurs for six hits. If it spreads to other players, the timer resets and newly infected players will initially yell "I will burn with you."
**'''Fire Wall:''' Olm shoots out two walls of fire at a player to trap them. If the player is on a tile that would be occupied by the fire wall, they will leap out and take 8-10 damage in the process. After the walls are placed, players in the tiles between the two walls will take 50-65 damage in 5 seconds if they do not escape. Any water, such as water spells, ice spells, [[Humidify]] or a filled [[watering can]] will suffice in dousing a segment of flame.
**'''Fire Wall:''' Olm shoots out two walls of fire at a player to trap them. If the player is on a tile that would be occupied by the fire wall, they will leap out and take 8-10 damage in the process. After the walls are placed, players in the tiles between the two walls will take 50-65 damage in 5 seconds if they do not escape. Any water, such as water spells, ice spells, Humidify or a filled watering can will suffice in dousing a segment of flame.
*'''Crystal:'''
*'''Crystal:'''
**'''Falling Crystals:''' Olm lets out a cry, targeting one player with a red aura. 11 spiked crystals fall from above, dealing up to 15-20 damage to anyone in the targeted tile.
**'''Falling Crystals:''' Olm lets out a cry, targeting one player with a red aura. 11 spiked crystals fall from above, dealing up to 15-20 damage to anyone in the targeted tile.
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===Fight overview===
===Fight overview===
[[File:Great Olm safespots.png|thumb|"Safespots" against Olm.]]
[[File:Mystical barrier (Chambers of Xeric).png|350px|center|The mystical barrier which precedes the boss fight.]]
[[File:Mystical barrier (Chambers of Xeric).png|350px|center|The mystical barrier which precedes the boss fight.]]
Olm has at least four phases, with an additional phase for every 8 players in the raid. Unlike the other bosses in the room, once the player enters his chamber, it is a fight to the death. In each phase except the penultimate and final ones, Olm will focus on a specific set of abilities referred to as '''powers'''.
Olm has at least four phases, with an additional phase for every 8 players in the raid. Unlike the other bosses in the room, once the player enters his chamber, it is a fight to the death. In each phase except the penultimate and final ones, Olm will focus on a specific set of abilities referred to as '''powers'''.


Like other bosses in the chambers, many of Olm's stats scale between its claws and head depending on the stats and amount of players in the raid, despite him having a pre-determined combat level. [[Monster Examine]] can be cast on him. In most small teams, his combat stats and max hit are comparable to [[God Wars Dungeon]] bosses. If stat draining attacks — such as [[dragon warhammer]] special attack — are used, they only affect the part of him that was hit. His stats also reset when a new phase starts.
Like other bosses in the chambers, many of Olm's stats scale between its claws and head depending on the stats and amount of players in the raid, despite him having a pre-determined combat level. If stat draining attacks — such as dragon warhammer special attack — are used, they only affect the part of him that was hit. His stats also reset when a new phase starts.


Olm attacks with ranged and magic, the former consisting of a chunk of crystal and latter green-coloured dragonfire. There is a 1/5 chance the Great Olm will switch between these attack styles each time its head performs an attack.{{CiteTwitter|author=Mod Ash|url=https://twitter.com/JagexAsh/status/1287733801398009857|date=27 July 2020|archiveurl=https://web.archive.org/web/20200727125925/https://twitter.com/JagexAsh/status/1287733801398009857|archivedate=27 July 2027|quote=[How does Olm decide when to change his attack style?] I'm not that familiar with its code, but it looks to me like the head has a 1/5 chance of switching, each time it performs an attack from the head.}} Olm has three attack zones to choose from; left, middle and right. He prioritises the zone with the most amount of players. If no players are in that zone, he will swerve his head accordingly and skip an attack in its attack rotation. If a player is in his attack zone but Olm swerves his head regardless, no attacks are skipped.  
Olm attacks with ranged and magic, the former consisting of a chunk of crystal and latter green-coloured dragonfire. There is a 1/5 chance the Great Olm will switch between these attack styles each time its head performs an attack. Olm has three attack zones to choose from; left, middle and right. He prioritises the zone with the most amount of players. If no players are in that zone, he will swerve his head accordingly and skip an attack in its attack rotation. If a player is in his attack zone but Olm swerves his head regardless, no attacks are skipped.  


Olm's attack rotation consists of the following below. Phase-specific attacks are incorporated into the attack pattern as an auto-attack and alternate between the available pool:
Olm's attack rotation consists of the following below. Phase-specific attacks are incorporated into the attack pattern as an auto-attack and alternate between the available pool:
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*Loops from above
*Loops from above


There is a 1/3 the Great Olm will carry out a phase-specific attack in lieu of an auto-attack (provided they are not on cooldown), increasing to a 1/2 chance during the final phase of the encounter.{{CiteTwitter|author=Mod Ash|url=https://twitter.com/JagexAsh/status/1434921194860519431|date=6 September 2021|archiveurl=https://web.archive.org/web/20210906172546/https://twitter.com/JagexAsh/status/1434921194860519431|archivedate=6 September 2021|quote=[What is the chance of Olm doing a phase special (deep burn, acid trail etc) compared to a regular range/mage attack?] As it can depend on whether the Olm's doing a cool-down from a previous one, I'm not sure the probability is so helpful here (...) but it'd be 1/3 normally, or 1/2 when the Olm's on its final phase.}} When this roll succeeds, the Great Olm will consequently try to avoid picking any of the available phase-specific attacks it has already used before.{{CiteTwitter|author=Mod Ash|url=https://twitter.com/JagexAsh/status/1562157994384805888|date=23 August 2022|archiveurl=https://web.archive.org/web/20220823192123/https://twitter.com/JagexAsh/status/1562157994384805888|archivedate=23 August 2022|quote=[(...) do you know if it rolls for each attack individually and each is on its own cooldown or does it roll to use a phase attack (eg, firewall/burn) and then rolls for which attack to use then alternates?] It'd decide to do a phase attack, then look at which was available and roll for its choice. (...) It tries to remember which it already did, so as not to do that one again in the phase.}}
There is a 1/3 the Great Olm will carry out a phase-specific attack in lieu of an auto-attack (provided they are not on cooldown), increasing to a 1/2 chance during the final phase of the encounter. When this roll succeeds, the Great Olm will consequently try to avoid picking any of the available phase-specific attacks it has already used before.


In order to progress to the next phase, both of Olm's hands must be disabled. The Olm's left hand will clench if it takes a particularly heavy hit, equal to at least 1/20 of its base health.{{CiteTwitter|author=Mod Ash|url=https://twitter.com/JagexAsh/status/1298675860111798274|date=26 August 2020|archiveurl=https://web.archive.org/web/20200826173729/https://twitter.com/JagexAsh/status/1298675860111798274|archivedate=26 August 2020|quote=[How does Olm left hand crippling work?] (...) This is when it clenches, right? That's triggered by damage, and it looks to me like it's got a threshold of 1/20 of the base health.}} Olm's head can be attacked at any phase, although he will automatically recover any damage taken shortly afterwards in all but the final phase. When both hands are disabled, Olm will retreat underground and shake the area with AoE falling crystals before reappearing on the other side with a new power. During the penultimate phase, the left hand gains a damage to health ability indicated with an infinity sign on it. In this phase, both of Olm's hands must be disabled within a specific time frame or it will recover back at full health. All powers are available to Olm during this phase, and it is indicated with Olm's head glowing.
In order to progress to the next phase, both of Olm's hands must be disabled. The Olm's left hand will clench if it takes a particularly heavy hit, equal to at least 1/20 of its base health. Olm's head can be attacked at any phase, although he will automatically recover any damage taken shortly afterwards in all but the final phase. When both hands are disabled, Olm will retreat underground and shake the area with AoE falling crystals before reappearing on the other side with a new power. During the penultimate phase, the left hand gains a damage to health ability indicated with an infinity sign on it. In this phase, both of Olm's hands must be disabled within a specific time frame or it will recover back at full health. All powers are available to Olm during this phase, and it is indicated with Olm's head glowing.


Once both hands are disabled, Olm remains on the spot and attempts a final stand. AoE crystals will continually fall from above until Olm is killed. As with the previous phase, he has access to all of its powers.
Once both hands are disabled, Olm remains on the spot and attempts a final stand. AoE crystals will continually fall from above until Olm is killed. As with the previous phase, he has access to all of its powers.
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}}
}}
<references />
<references />
|-|
|-|
Ranged=
Ranged=
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|neck1 = {{plink|Necklace of anguish}}
|neck1 = {{plink|Necklace of anguish}}
|neck2 = {{plink|Amulet of fury}}
|neck2 = {{plink|Amulet of fury}}
|cape1 = {{plink|Dizana's quiver}}
|cape1 = {{plink|Ava's assembler}}
|cape2 = {{plink|Ava's assembler}}
|cape2 = {{plink|Ava's accumulator}}
|cape3 = {{plink|Ava's accumulator}}
|body1 = {{plink|Masori body (f)}}
|body1 = {{plink|Masori body (f)}}
|body2 = {{plink|Armadyl chestplate}}
|body2 = {{plink|Armadyl chestplate}}
|body3 = {{plink|Blessed body|pic=Ancient d'hide body}}
|body3 = {{plink|Blessed body|pic=Ancient d'hide body}}
|body4 = {{plink|Elite void top}}<ref name=void/>
|body4 = {{plink|Elite void top}}
|legs1 = {{plink|Masori chaps (f)}}
|legs1 = {{plink|Masori chaps (f)}}
|legs2 = {{plink|Armadyl chainskirt}}
|legs2 = {{plink|Armadyl chainskirt}}
|legs3 = {{plink|Blessed chaps|pic=Ancient chaps}}
|legs3 = {{plink|Blessed chaps|pic=Ancient chaps}}
|legs4 = {{plink|Elite void robe}}<ref name=void/>
|legs4 = {{plink|Elite void robe}}
|weapon1 = {{plink|Twisted bow}}
|weapon1 = {{plink|Twisted bow}}
|weapon2 = {{plink|Dragon hunter crossbow}}
|weapon2 = {{plink|Dragon hunter crossbow}}
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|hands1 = {{plink|Zaryte vambraces}}
|hands1 = {{plink|Zaryte vambraces}}
|hands2 = {{plink|Barrows gloves}}
|hands2 = {{plink|Barrows gloves}}
|hands3 = {{plink|Void knight gloves}}<ref name=void/>
|hands3 = {{plink|Void knight gloves}}
|feet1 = {{plink|Pegasian boots}}<ref name=switch/>
|feet1 = {{plink|Pegasian boots}}<ref name=switch/>
|ring1 = See Melee
|ring1 = See Melee
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===Setups===
===Setups===
Potions are free at the start of every raid.
{|
{|
!Minimum
!Minimum
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|head = Helm of neitiznot
|head = Helm of neitiznot
|cape = Fire cape
|cape = Fire cape
|neck = Amulet of fury
|neck = Occult necklace
|ammo = Ruby dragon bolts (e)
|ammo = Ruby bolts (e)
|weapon = Abyssal tentacle
|weapon = Trident of the seas
|torso = Fighter torso
|torso = Mystic robe top
|legs = Black d'hide chaps
|legs = Mystic robe bottom
|shield = Dragon defender
|shield = Dragon defender
|gloves = Barrows gloves
|gloves = Barrows gloves
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{{Equipment
{{Equipment
|head = Serpentine helm
|head = Serpentine helm
|cape = Fire cape
|cape = Imbued saradomin cape
|neck = Amulet of torture
|neck = Occult necklace
|ammo = Ruby dragon bolts (e)
|ammo = Ruby dragon bolts (e)
|weapon = Dragon hunter lance
|weapon = Sanguinesti staff
|torso = Fighter torso
|torso = Ahrim's robetop
|legs = Zamorak chaps
|legs = Ahrim's robeskirt
|shield = Dragon defender
|shield = Dragon defender
|gloves = Ferocious gloves
|gloves = Tormented bracelet
|boots = Dragon boots
|boots = Dragon boots
|ring = Lightbearer
|ring = Lightbearer
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|
|
{{Equipment
{{Equipment
|head = Torva full helm
|head = Ancestral hat
|cape = Infernal cape
|cape = Imbued saradomin max cape | capeClickable = yes
|neck = Amulet of torture
|neck = Occult necklace
|ammo = Dragon arrows
|ammo = Dragon arrows(p++)
|weapon = Dragon pickaxe
|weapon = Tumeken's shadow
|torso = Torva platebody
|torso = Ancestral robe top
|legs = Torva platelegs
|legs = Ancestral robe bottom
|shield = Avernic defender
|shield =  
|gloves = Ferocious gloves
|gloves = Tormented bracelet
|boots = Primordial boots
|boots = Eternal boots
|ring = Lightbearer
|ring = Magus ring
}}
}}
|-
|-
|{{Inventory
|{{Inventory
| Dragon crossbow | Ava's accumulator | Trident of the swamp | occult necklace
| Abyssal whip | Bandos chestplate | Dragon crossbow | Zamorak d'hide body
| Black d'hide body | Toxic blowpipe | Mystic robe top (dark) | Mystic robe bottom (dark)  
| Bandos godsword | Bandos tassets |Ava's assembler  | Zamorak chaps
| Bandos godsword | Anglerfish | Rune pouch | Imbued saradomin cape
|Overload (+)(4)  | Prayer enhance (+)(4)  | Revitalisation (+)(4) | Revitalisation (+)(4)
| Rune pickaxe | Salve amulet(ei) | Dragon sword | Lockpick
| Xeric's aid (+)(4)| Xeric's aid (+)(4) | Xeric's aid (+)(4) | Revitalisation (+)(4)
| Sanfew serum(4) | Saradomin brew(4) | Saradomin brew(4) | Stamina potion(4)
| Xeric's aid (+)(4) | Xeric's aid (+)(4)| Xeric's aid (+)(4)| Revitalisation (+)(4)
| Super restore(4) | Saradomin brew(4) | Saradomin brew(4) | Super combat potion(4)  
| Xeric's aid (+)(4)| Xeric's aid (+)(4) | Xeric's aid (+)(4) | Revitalisation (+)(4)
| Super restore(4) | Saradomin brew(4) | Saradomin brew(4) | Ranging potion(4)  
| Xeric's aid (+)(4) | Stamina potion(4)| Stamina potion(4) | Sanfew serum(4) |
|
}}
}}
|{{Inventory
|{{Inventory
| Dragon hunter crossbow | Ava's assembler | Sanguinesti staff | occult necklace
| Dragon hunter crossbow | Ava's assembler | Fire cape | Dragon hunter lance
| Zamorak d'hide body | Necklace of anguish | Ahrim's robetop | Ahrim's robeskirt
| Zamorak d'hide body | Necklace of anguish | Amulet of torture|Zamorak chaps
| Twisted buckler | Barrows gloves | Tormented bracelet | Imbued saradomin cape
| Twisted buckler | Barrows gloves | Ferocious gloves | Fighter torso
| Toxic blowpipe | Anglerfish | Book of the dead | Stamina potion(4)
| | | | Stamina potion(4)
| Super restore(4) | Saradomin brew(4) | Saradomin brew(4) | Super combat potion(4)
| | | |
| Super restore(4) | Saradomin brew(4) | Saradomin brew(4) | Ranging potion(4)
| | | | Pegasian boots
| Bandos godsword | Dragon pickaxe | Salve amulet(ei) | Rune pouch
| |  | Necklace of anguish | Ava's assembler |
}}
}}
|{{Inventory
|{{Inventory
| Twisted bow | Necklace of anguish | Tumeken's shadow | Occult necklace
| Scythe of vitur | Torva platebody | Infernal max cape | Torva full helm
| Masori body (f) | Masori chaps (f) | Ancestral robe top | Ancestral robe bottom
| Amulet of torture | Torva platelegs | Ferocious gloves | Primordial boots
| zaryte vambraces | Blessed dizana's quiver | Tormented bracelet | Imbued saradomin cape 
| Dragon claws | Ultor ring | Xeric's aid (+)(4) | Prayer enhance (+)(4)
| Masori mask (f)| Toxic blowpipe | Ancestral hat | Stamina potion(4)  
| Saradomin brew(4)| Sanfew serum(4) | Revitalisation (+)(4) | Stamina potion(4)  
| Saradomin brew(4) | Anglerfish | Sanfew serum(4) | Super combat potion(4)  
| Twisted bow | |  | Xeric's aid (+)(4)
| Saradomin brew(4) | Saradomin brew(4) | Super restore(4) | Ranging potion(4)  
| Void knight gloves | Elite void top | Venator ring | Pegasian boots
| Scythe of vitur | Bandos godsword | Book of the dead | Rune pouch |
| Void ranger helm | Elite void robe | Necklace of anguish | Ava's assembler |
}}
}}
|}<span style="display:none"><ref>The Bandos Godsword special attack drains more defence than the Dragon Warhammer's special attack after two hammers or more have successfully landed.</ref><ref>If a scythe is being used, bring a stab weapon for raids containing Vasa.</ref><ref>Additional items brought to speed up the raid include: Zaryte crossbow + Ruby bolts (e), Voidwaker, Dragon claws.</ref></span>
|}<span style="display:none"><ref>Energy drains 25% slower with [[max cape]].</ref><ref>Xeric's aid (+)(4), Revitalisation (+)(4) and Prayer enhance (+)(4) can be spawned, which saves time. </ref><ref>The Bandos Godsword special attack drains more defence than the Dragon Warhammer's special attack after two hammers or more have successfully landed.</ref><ref>Additional items brought to speed up the raid include: Zaryte crossbow + Ruby bolts (e), Voidwaker, Dragon claws.</ref></span>
<references />
<references />
{{CoxDrops}}
----
{{Bosses}}

Latest revision as of 15:02, 29 May 2024

Great Olm
Released2023 (Update unknown)
DonatorNo
Combat level1,001
Size3x3
ExamineFerocious. It's unnerving.
Combat info
Max hitVaries
AggressiveYes
PoisonousYes
Attack styleMagic, Ranged
Attack speed4 ticks (2.4 seconds)
Combat stats
800250250150250250
Aggressive stats
Monster attack bonusMonster strength bonusMonster magic strength bonusMonster ranged strength bonus
+0+0+60+0+60+0
Defensive stats
+200+200+200+200+50
Advanced data
Monster ID7551

The Great Olm (referred to as the Guardian in the Deep by Xeric's followers) is the final boss in the Chambers of Xeric raid. A large, blind, white salamander, it is one of Xeric's greatest possessions.

Mechanics

Attacks

  • Standard attacks: Olm has two standard attacks: Magic and Ranged. The magic attacks are large green orbs, while the ranged attacks are smaller chunks of crystal. Both deal the same amount of damage. Prayer reduces the damage by roughly 75-80%.
  • Spheres: Olm randomly picks a sphere (red, green or purple) and sends it at the player. If not blocked, the player will be damaged approximately 50% of their current Hitpoints. If a protection prayer was used when the sphere was launched, it is disabled and the player's Prayer is reduced by 50%. To block the attack, pray accordingly before and as the sphere hits you:
    • Red (sphere of aggression): Protect from Melee
    • Green (sphere of accuracy and dexterity): Protect from Missiles
    • Purple (sphere of magical power): Protect from Magic

During phases 1-3, Olm also has access to these specific attacks:

  • Crystal Burst: Olm throws a crystal seedling under every player in the chamber. A few seconds later, the crystals burst and shove the player to a nearby tile if they are on top of them for heavy damage. The left hand will briefly show a crystal icon when using this attack.
  • Lightning: Shoots out lightning running north and/or south of the chamber. Getting hit by a bolt of lightning electrocutes the player, disabling their overhead prayers, dealing moderate damage, and binding them. The left hand will briefly show a lightning bolt when using this attack.
  • Swap: Olm will perform a teleport attack that deals damage the further the player is from the target. The left hand briefly shows a swirl when using this attack. If alone, Olm will pick a random tile anywhere in the chamber; if there are more players in the room, Olm will evenly distribute the amount of teleports. If there is an odd-numbered amount of people inside, then those people will not be subjected to the attack.

Olm also has phase-unique attacks which can replace one of the auto-attacks in his rotation:

  • Acid:
    • Acid Spray: Olm spits out several pools of acid around the chamber. Standing on top of an acid pool deals 3-6 damage per tick and inflicts poison starting at 2 damage.
    • Acid Drip: Olm covers a player in acid, causing them to generate acid pools under them. Standing still will deal damage and moving will generate more pools, though it is not much of a deal in small groups. The pools function the same way as the pools in the spray attack.
A group of players fighting the Great Olm.
  • Flame:
    • Deep Burn: Olm shoots out a green fireball at a player, causing them to yell "Burn with me!". The targeted player takes 5 damage every few ticks, dropping stats by 2 each time this occurs for six hits. If it spreads to other players, the timer resets and newly infected players will initially yell "I will burn with you."
    • Fire Wall: Olm shoots out two walls of fire at a player to trap them. If the player is on a tile that would be occupied by the fire wall, they will leap out and take 8-10 damage in the process. After the walls are placed, players in the tiles between the two walls will take 50-65 damage in 5 seconds if they do not escape. Any water, such as water spells, ice spells, Humidify or a filled watering can will suffice in dousing a segment of flame.
  • Crystal:
    • Falling Crystals: Olm lets out a cry, targeting one player with a red aura. 11 spiked crystals fall from above, dealing up to 15-20 damage to anyone in the targeted tile.
    • Crystal Bombs: Olm shoots out a crystal bomb (up to three at most; two for smaller groups). The bomb explodes after being deployed for several seconds, covering a radius of four tiles. The minimum amount of damage dealt is 15, increasing by an additional 15 damage for every tile closer to it.

There are also attacks applied during other segments of the fight:

  • Autoheal: During the first three phases, any attacks aimed at the head are completely healed after several ticks have passed. In the third phase, the left arm also gets a variant of this ability where any attacks that deal damage will cause it to heal instead. When this is performed the left hand shows an infinity symbol.
  • Falling Crystals: During phase transitions and the last phase, Olm causes chunks of crystal to fall from above. These crystals have a 3x3 AoE; getting directly hit (underneath the shadow) by them will deal 16-25 damage, while getting indirectly hit (one tile from centre) deals 10-16 damage. One crystal will always be aimed at a random player in the chamber. A shadow will indicate where the crystal will land.
  • Life Siphon: In the last phase, Olm will shoot out two blue projectiles which generate a shield when it hits the ground. Several ticks later, Olm will damage anyone not on the targeted tiles for moderate damage, healing himself for five times the total amount of damage it deals to the team.

Fight overview

"Safespots" against Olm.
The mystical barrier which precedes the boss fight.
The mystical barrier which precedes the boss fight.

Olm has at least four phases, with an additional phase for every 8 players in the raid. Unlike the other bosses in the room, once the player enters his chamber, it is a fight to the death. In each phase except the penultimate and final ones, Olm will focus on a specific set of abilities referred to as powers.

Like other bosses in the chambers, many of Olm's stats scale between its claws and head depending on the stats and amount of players in the raid, despite him having a pre-determined combat level. If stat draining attacks — such as dragon warhammer special attack — are used, they only affect the part of him that was hit. His stats also reset when a new phase starts.

Olm attacks with ranged and magic, the former consisting of a chunk of crystal and latter green-coloured dragonfire. There is a 1/5 chance the Great Olm will switch between these attack styles each time its head performs an attack. Olm has three attack zones to choose from; left, middle and right. He prioritises the zone with the most amount of players. If no players are in that zone, he will swerve his head accordingly and skip an attack in its attack rotation. If a player is in his attack zone but Olm swerves his head regardless, no attacks are skipped.

Olm's attack rotation consists of the following below. Phase-specific attacks are incorporated into the attack pattern as an auto-attack and alternate between the available pool:

  • 2 auto-attacks
  • Crystal Burst
  • 2 auto-attacks
  • Lightning
  • 2 auto-attacks
  • Teleport
  • Loops from above

There is a 1/3 the Great Olm will carry out a phase-specific attack in lieu of an auto-attack (provided they are not on cooldown), increasing to a 1/2 chance during the final phase of the encounter. When this roll succeeds, the Great Olm will consequently try to avoid picking any of the available phase-specific attacks it has already used before.

In order to progress to the next phase, both of Olm's hands must be disabled. The Olm's left hand will clench if it takes a particularly heavy hit, equal to at least 1/20 of its base health. Olm's head can be attacked at any phase, although he will automatically recover any damage taken shortly afterwards in all but the final phase. When both hands are disabled, Olm will retreat underground and shake the area with AoE falling crystals before reappearing on the other side with a new power. During the penultimate phase, the left hand gains a damage to health ability indicated with an infinity sign on it. In this phase, both of Olm's hands must be disabled within a specific time frame or it will recover back at full health. All powers are available to Olm during this phase, and it is indicated with Olm's head glowing.

Once both hands are disabled, Olm remains on the spot and attempts a final stand. AoE crystals will continually fall from above until Olm is killed. As with the previous phase, he has access to all of its powers.

Equipment

Note: The equipment layouts below is for melee only, with magic and ranged switches in the player's inventory due to all three combat styles being required.

Recommended equipment for Melee
SlotItem (most effective → least effective)
HeadTorva full helm Torva full helmNeitiznot faceguard Neitiznot faceguardInquisitor's great helm Inquisitor's great helmSerpentine helm Serpentine helm
NeckAmulet of torture Amulet of tortureAmulet of blood fury Amulet of blood furyAmulet of fury Amulet of furyN/A
BackInfernal cape Infernal capeFire cape Fire capeN/AN/A
BodyTorva platebody Torva platebodyBandos chestplate Bandos chestplateInquisitor's hauberk Inquisitor's hauberkFighter torso Fighter torso
LegsTorva platelegs Torva platelegsInquisitor's plateskirt Inquisitor's plateskirtBandos tassets Bandos tassetsBlessed chaps Blessed chaps
WeaponScythe of vitur Scythe of viturDragon hunter lance Dragon hunter lanceAbyssal tentacle Abyssal tentacle/Ghrazi rapier Ghrazi rapierOsmumten's fang Osmumten's fang
ShieldAvernic defender Avernic defenderDragon defender Dragon defenderN/AN/A
Ammo/SpellSee RangedN/AN/AN/A
handsFerocious gloves Ferocious glovesBarrows gloves Barrows glovesN/AN/A
BootsPrimordial boots Primordial bootsDragon boots Dragon bootsN/AN/A
RingLightbearer LightbearerUltor ring Ultor ringBerserker ring (i) Berserker ring (i)Brimstone ring Brimstone ring
Special attackBandos godsword Bandos godswordDragon warhammer Dragon warhammerArclight ArclightN/A
Recommended equipment for Ranged
SlotItem (most effective → least effective)
HeadMasori mask (f) Masori mask (f)Armadyl helmet Armadyl helmet[1]Void ranger helm Void ranger helmAny melee helmet
NeckNecklace of anguish Necklace of anguishAmulet of fury Amulet of furyN/AN/A
BackAva's assembler Ava's assemblerAva's accumulator Ava's accumulatorN/AN/A
BodyMasori body (f) Masori body (f)Armadyl chestplate Armadyl chestplateBlessed body Blessed bodyElite void top Elite void top
LegsMasori chaps (f) Masori chaps (f)Armadyl chainskirt Armadyl chainskirtBlessed chaps Blessed chapsElite void robe Elite void robe
WeaponTwisted bow Twisted bowDragon hunter crossbow Dragon hunter crossbowZaryte crossbow Zaryte crossbowArmadyl crossbow Armadyl crossbow
ShieldTwisted buckler Twisted buckler[2]Dragonfire ward Dragonfire ward[2]Odium ward Odium ward[2]N/A
Ammo/SpellDragon arrows Dragon arrowsRuby dragon bolts (e) Ruby dragon bolts (e)Ruby bolts (e) Ruby bolts (e)N/A
handsZaryte vambraces Zaryte vambracesBarrows gloves Barrows glovesVoid knight gloves Void knight glovesN/A
BootsPegasian boots Pegasian boots[1]N/AN/AN/A
RingSee MeleeN/AN/AN/A
Special attackZaryte crossbow Zaryte crossbowN/AN/AN/A
  1. ↑ 1.0 1.1 Additional accuracy switches for helmet/offhand/boot slots are incredibly minor timesaves, an extra brew is almost always more useful
  2. ↑ 2.0 2.1 2.2 Bring whenever using crossbows, other offhands do not give damage bonus and are not worth bringing
Recommended equipment for Magic
SlotItem (most effective → least effective)
HeadAncestral hat Ancestral hat[1]Any melee helmetN/AN/A
NeckOccult necklace Occult necklaceAmulet of fury Amulet of furyN/AN/A
BackGod capes#Imbuing Imbued god capeN/AN/AN/A
BodyAncestral robe top Ancestral robe topVirtus robe top Virtus robe topAhrim's robetop Ahrim's robetopN/A
LegsAncestral robe bottom Ancestral robe bottomVirtus robe bottom Virtus robe bottomAhrim's robeskirt Ahrim's robeskirtN/A
WeaponTumeken's shadow Tumeken's shadowSanguinesti staff Sanguinesti staffTrident of the swamp Trident of the swampHarmonised nightmare staff Harmonised nightmare staff[2]
ShieldTome of fire Tome of fire[3]Elidinis' ward (f) Elidinis' ward (f)Arcane spirit shield Arcane spirit shield[4]N/A
Ammo/SpellSee RangedN/AN/AN/A
handsTormented bracelet Tormented braceletBarrows gloves Barrows glovesN/AN/A
BootsCamp/Takeoff melee bootsN/AN/AN/A
RingSee MeleeN/AN/AN/A
  1. ↑ Ancestral hat is only worth bringing if it raises your max hit.
  2. ↑ Only used with fire surge, tome of fire, and full ancestral
  3. ↑ Only brought if using a Harmonised Nightmare Staff or if Ice Demon is in the raid
  4. ↑ Extremely minor switch for teams, mainly brought for its defensive bonuses in solos

Setups

Potions are free at the start of every raid.

Minimum Medium Max
Helm of neitiznot
Fire cape
Occult necklace
Ruby bolts (e)
Trident of the seas
Mystic robe top
Dragon defender
Mystic robe bottom
Barrows gloves
Dragon boots
Berserker ring (i)
Serpentine helm
Imbued saradomin cape
Occult necklace
Ruby dragon bolts (e)
Sanguinesti staff
Ahrim's robetop
Dragon defender
Ahrim's robeskirt
Tormented bracelet
Dragon boots
Lightbearer
Ancestral hat
Occult necklace
Dragon arrows(p++)
Tumeken's shadow
Ancestral robe top
Ancestral robe bottom
Tormented bracelet
Eternal boots
Magus ring
Abyssal whipBandos chestplateDragon crossbowZamorak d'hide body
Bandos godswordBandos tassetsAva's assemblerZamorak chaps
Overload (+)(4)Prayer enhance (+)(4)Revitalisation (+)(4)Revitalisation (+)(4)
Xeric's aid (+)(4)Xeric's aid (+)(4)Xeric's aid (+)(4)Revitalisation (+)(4)
Xeric's aid (+)(4)Xeric's aid (+)(4)Xeric's aid (+)(4)Revitalisation (+)(4)
Xeric's aid (+)(4)Xeric's aid (+)(4)Xeric's aid (+)(4)Revitalisation (+)(4)
Xeric's aid (+)(4)Stamina potion(4)Stamina potion(4)Sanfew serum(4)
Dragon hunter crossbowAva's assemblerFire capeDragon hunter lance
Zamorak d'hide bodyNecklace of anguishAmulet of tortureZamorak chaps
Twisted bucklerBarrows glovesFerocious glovesFighter torso
Stamina potion(4)
Pegasian boots
Necklace of anguishAva's assembler
Scythe of viturTorva platebodyInfernal max capeTorva full helm
Amulet of tortureTorva platelegsFerocious glovesPrimordial boots
Dragon clawsUltor ringXeric's aid (+)(4)Prayer enhance (+)(4)
Saradomin brew(4)Sanfew serum(4)Revitalisation (+)(4)Stamina potion(4)
Twisted bowXeric's aid (+)(4)
Void knight glovesElite void topVenator ringPegasian boots
Void ranger helmElite void robeNecklace of anguishAva's assembler

[1][2][3][4]

  1. ↑ Energy drains 25% slower with max cape.
  2. ↑ Xeric's aid (+)(4), Revitalisation (+)(4) and Prayer enhance (+)(4) can be spawned, which saves time.
  3. ↑ The Bandos Godsword special attack drains more defence than the Dragon Warhammer's special attack after two hammers or more have successfully landed.
  4. ↑ Additional items brought to speed up the raid include: Zaryte crossbow + Ruby bolts (e), Voidwaker, Dragon claws.


Chambers of Xeric Drop Rates

  • There are two drop tables: UNIQUE and DEFAULT.
  • For every 3,000 Points you receive, you have a +1% (changes based on Donator Rank) chance of landing on the UNIQUE drop table.
    Meaning if you solo a normal raid without dying you would receive 32,000-ish points (7.5 per hit) or a 10% chance of landing on the UNIQUE drop table. Donators do get a drop boost here.
    • Normal Player: 1%
    • Donator: 1.1%
    • Super: 1.2%
    • Extreme: 1.3%
    • Legendary: 1.4%
    • Royal : 1.5%
  • Twisted Bow, Rigour & Augury prayers have a drop rate of 1/512 from the UNIQUE table.
    This means that a solo-olm kill without dying would give you a drop rate of 1/5120 for each of those items (as a normal player).
    As an example, if you were a Legendary donator and solo-killed the olm without dying, your Twisted Bow drop rate would be 512 * (100/(1.4 * 10)) = 1/3657 - instead of 1/5120 as a non-donator.
  • You will always receive a drop from the DEFAULT drop table as long as you have over 3,000 Points, every 300 points above that gives you a +1% chance of receiving another DEFAULT drop from the table.
  • The Olmlet pet is only rolled if you land on a purple chest (unique drop), and then the drop rate is 1/65, so in theory, it's roughly 1/650 raids.
  • The Metamorphic Dust is only dropped if you finish a raid in Challenge mode, the drop rate is always 1/400 there (can be obtained without a purple chest).
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