Crassian Leviathan

For the achievement, see Crassian Leviathan (achievement).

This article has a strategy guide. All information on mechanics, setups, and tactics is on the subpage.

Normal mode (normal)Normal mode (mirage) Story mode (normal)Story mode (mirage)
Crassian Leviathan
Release			25 February 2019 (Update)
Members			Yes
Examine
A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.
Combat info
Level			LP			XP			XP
1500			380,000			9,000			2,970
Equipment XP (2H/MH & Armour/OH)
540 / 360 / 180
Aggressive						Poisonous
						???
Offensive
Max hit
3000			3000			0			6000
Style						Rate
						4 ticks (2.4s)
Combat levels
? (edit)				90				90
Accuracy
2765				2765				2765
Abilities used
None
Defensive
Armour				Weakness			Susceptible
2178		85
Affinities
-			55			55			55
Immunities
Not immune			Not immune			Immune			Not immune
Advanced data
NPC ID				26050
Links				bestiary • MRND
FAQ • doc

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4 ticks (2.4s)

4 ticks (2.4s)

4 ticks (2.4s)

4 ticks (2.4s)

Crassian Leviathan? (edit)? (edit)? (edit)? (edit) Crassian Leviathan Crassian Leviathan Crassian Leviathan Crassian Leviathan Crassian Leviathan? (edit)? (edit)surface? (edit)? (edit)? (edit)2605026051? (edit)2605026051bestiary • MRNDbestiary • MRNDbestiary • MRND? (edit){"release_date":"25 February 2019","poisonous":false,"members":"Yes","examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","lifepoints":0,"experience":0,"name":"Crassian Leviathan","release_update_post":"Elite Dungeons - Shadow Reef","aggressive":true}{"ranged":90,"armour":2178,"version":"Normal mode (normal)","experience":9000,"acc_ranged":2765,"acc_magic":2765,"acc_melee":2765,"max_spec":6000,"aff_ranged":55,"max_melee":3000,"defence":85,"max_ranged":3000,"id":"26050","aff_melee":55,"release_date":"25 February 2019","aff_magic":55,"examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","aggressive":true,"release_update_post":"Elite Dungeons - Shadow Reef","style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","lifepoints":380000,"max_magic":0,"members":"Yes","weakness":"[[File:Zero weakness icon.png¦25px¦link=No weakness]]","level":1500,"magic":90,"poisonous":true,"name":"Crassian Leviathan"}{"ranged":90,"armour":2178,"version":"Normal mode (mirage)","experience":9000,"acc_ranged":2765,"acc_magic":2765,"acc_melee":2765,"max_spec":6000,"aff_ranged":55,"max_melee":3000,"defence":85,"max_ranged":3000,"id":"26051","aff_melee":55,"release_date":"25 February 2019","aff_magic":55,"examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","aggressive":true,"release_update_post":"Elite Dungeons - Shadow Reef","style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","lifepoints":380000,"max_magic":0,"members":"Yes","weakness":"[[File:Zero weakness icon.png¦25px¦link=No weakness]]","level":1500,"magic":90,"poisonous":true,"name":"Crassian Leviathan"}{"release_date":"25 February 2019","examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","poisonous":true,"style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","level":1500,"max_spec":600,"max_melee":300,"max_ranged":300,"members":"Yes","max_magic":0,"lifepoints":190000,"experience":0,"version":"Story mode (normal)","name":"Crassian Leviathan","release_update_post":"Elite Dungeons - Shadow Reef","aggressive":true}{"release_date":"25 February 2019","examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","poisonous":true,"style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","level":1500,"max_spec":600,"max_melee":300,"max_ranged":300,"members":"Yes","max_magic":0,"lifepoints":190000,"experience":0,"version":"Story mode (mirage)","name":"Crassian Leviathan","release_update_post":"Elite Dungeons - Shadow Reef","aggressive":true}Versions: 4

SMW Subobject for Story mode (mirage)Monster JSON: {"release_date":"25 February 2019","examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","poisonous":true,"style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","level":1500,"max_spec":600,"max_melee":300,"max_ranged":300,"members":"Yes","max_magic":0,"lifepoints":190000,"experience":0,"version":"Story mode (mirage)","name":"Crassian Leviathan","release_update_post":"Elite Dungeons - Shadow Reef","aggressive":true}NPC ranged max hit: 300NPC melee affinity: 0NPC attack style: File:Ranged-icon.png, File:Attack-icon.pngNPC magic accuracy: 0NPC ranged affinity: 0NPC magic max hit: 0Slayer level: 0Release date: 25 February 2019Version anchor: Story mode (mirage)Monster name: Crassian LeviathanNPC magic affinity: 0Combat level: 1500Is variant of: Crassian LeviathanLocation restriction: surfaceNPC Attack level: 0Weakness by class: noneNPC susceptible to poison: trueIs NPC aggressive: trueCombat experience: 0NPC susceptible to drain: trueNPC melee accuracy: 0NPC ranged accuracy: 0NPC life points: 190000NPC Defence level: 0Is NPC poisonous: trueIs members only: trueNPC special max hit: 600NPC armour: 0Slayer experience: 0NPC Magic level: 0NPC attack style text: ranged, meleeNPC melee max hit: 300NPC Ranged level: 0NPC susceptible to stun: falseNPC susceptible to deflect: true

SMW Subobject for Story mode (normal)Monster JSON: {"release_date":"25 February 2019","examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","poisonous":true,"style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","level":1500,"max_spec":600,"max_melee":300,"max_ranged":300,"members":"Yes","max_magic":0,"lifepoints":190000,"experience":0,"version":"Story mode (normal)","name":"Crassian Leviathan","release_update_post":"Elite Dungeons - Shadow Reef","aggressive":true}NPC ranged max hit: 300NPC melee affinity: 0NPC attack style: File:Ranged-icon.png, File:Attack-icon.pngNPC magic accuracy: 0NPC ranged affinity: 0NPC magic max hit: 0Slayer level: 0Release date: 25 February 2019Version anchor: Story mode (normal)Monster name: Crassian LeviathanNPC magic affinity: 0Combat level: 1500Is variant of: Crassian LeviathanLocation restriction: surfaceNPC Attack level: 0Weakness by class: noneNPC susceptible to poison: trueIs NPC aggressive: trueCombat experience: 0NPC susceptible to drain: trueNPC melee accuracy: 0NPC ranged accuracy: 0NPC life points: 190000NPC Defence level: 0Is NPC poisonous: trueIs members only: trueNPC special max hit: 600NPC armour: 0Slayer experience: 0NPC Magic level: 0NPC attack style text: ranged, meleeNPC melee max hit: 300NPC Ranged level: 0NPC susceptible to stun: falseNPC susceptible to deflect: true

SMW Subobject for Normal mode (mirage)Monster JSON: {"ranged":90,"armour":2178,"version":"Normal mode (mirage)","experience":9000,"acc_ranged":2765,"acc_magic":2765,"acc_melee":2765,"max_spec":6000,"aff_ranged":55,"max_melee":3000,"defence":85,"max_ranged":3000,"id":"26051","aff_melee":55,"release_date":"25 February 2019","aff_magic":55,"examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","aggressive":true,"release_update_post":"Elite Dungeons - Shadow Reef","style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","lifepoints":380000,"max_magic":0,"members":"Yes","weakness":"[[File:Zero weakness icon.png¦25px¦link=No weakness]]","level":1500,"magic":90,"poisonous":true,"name":"Crassian Leviathan"}NPC ranged max hit: 3000NPC melee affinity: 55NPC primary attack style: magicNPC attack style: File:Ranged-icon.png, File:Attack-icon.pngNPC magic accuracy: 2765NPC ranged affinity: 55NPC magic max hit: 0Weakness text: nothingNPC ID: 26051Release date: 25 February 2019Version anchor: Normal mode (mirage)Monster name: Crassian LeviathanNPC magic affinity: 55Combat level: 1500NPC susceptible to poison: trueIs variant of: Crassian LeviathanLocation restriction: surfaceCombat experience: 9000NPC Ranged level: 90NPC ranged accuracy: 2765Weakness by class: noneNPC susceptible to drain: trueIs NPC aggressive: trueIs NPC poisonous: trueSusceptible to: hexhunterNPC melee accuracy: 2765NPC susceptible to deflect: trueNPC life points: 380000NPC Defence level: 85NPC attack style text: ranged, meleeIs members only: trueNPC special max hit: 6000NPC armour: 2178Slayer experience: 0NPC Magic level: 90NPC Attack level: 0NPC melee max hit: 3000Slayer level: 0NPC susceptible to stun: falseWeakness: File:Zero weakness icon.png

SMW Subobject for Normal mode (normal)Monster JSON: {"ranged":90,"armour":2178,"version":"Normal mode (normal)","experience":9000,"acc_ranged":2765,"acc_magic":2765,"acc_melee":2765,"max_spec":6000,"aff_ranged":55,"max_melee":3000,"defence":85,"max_ranged":3000,"id":"26050","aff_melee":55,"release_date":"25 February 2019","aff_magic":55,"examine":"A huge beast of the undercurrents. We think it has at least five heads, but we're not 100% sure.","aggressive":true,"release_update_post":"Elite Dungeons - Shadow Reef","style":"[[File:Ranged-icon.png¦25px¦link=Ranged]] [[File:Attack-icon.png¦25px¦link=Melee]]","lifepoints":380000,"max_magic":0,"members":"Yes","weakness":"[[File:Zero weakness icon.png¦25px¦link=No weakness]]","level":1500,"magic":90,"poisonous":true,"name":"Crassian Leviathan"}NPC ranged max hit: 3000NPC melee affinity: 55NPC primary attack style: magicNPC attack style: File:Ranged-icon.png, File:Attack-icon.pngNPC magic accuracy: 2765NPC ranged affinity: 55NPC magic max hit: 0Weakness text: nothingNPC ID: 26050Release date: 25 February 2019Version anchor: Normal mode (normal)Monster name: Crassian LeviathanNPC magic affinity: 55Combat level: 1500NPC susceptible to poison: trueIs variant of: Crassian LeviathanLocation restriction: surfaceCombat experience: 9000NPC Ranged level: 90NPC ranged accuracy: 2765Weakness by class: noneNPC susceptible to drain: trueIs NPC aggressive: trueIs NPC poisonous: trueSusceptible to: hexhunterNPC melee accuracy: 2765NPC susceptible to deflect: trueNPC life points: 380000NPC Defence level: 85NPC attack style text: ranged, meleeIs members only: trueNPC special max hit: 6000NPC armour: 2178Slayer experience: 0NPC Magic level: 90NPC Attack level: 0NPC melee max hit: 3000Slayer level: 0NPC susceptible to stun: falseWeakness: File:Zero weakness icon.png

The Crassian Leviathan is the first boss inside of The Shadow Reef. After The Ambassador was informed by Oreb that the World Guardian was arriving with their allies, The Ambassador summoned the Leviathan and blessed it with Xau-Tak's power.

Strategies

The arena of the Crassian Leviathan.

The main head of the Crassian Leviathan is found at the north end of a small, rectangular arena. It uses melee and ranged auto-attacks depending on how far the player stands from it. The boss uses its auto-attacks before using one of its two special attacks. After the boss has used enough attacks, it will shift to the opposite end of the arena, forcing the player to move past the other leviathan heads and through the pool of poison. The extra leviathans are not attackable but can lunge at players, dealing unblockable poison damage and stunning them.

The Crassian Leviathan itself has a moderately high defence and has the ability to heal itself 3,000 life points for each player fighting it every several seconds. Three players will cause it to heal 9,000 life points every time it heals itself. Players can reduce this amount by poisoning it, using either weapon poisons or the effect of cinderbane gloves or the upgraded bone blowpipe, which reduces its healing to 1,000 per player.

Special attacks

The special attacks of The Crassian Leviathan include the Head Crash attack and the Acid Breath attack.

The Head Crash attack consists of the leviathan slamming its head in the ground, dealing multiple hits of high typeless damage. This can be avoided by running to either the far left or far right depending on which side the leviathan is crashing its head towards. After the first Head Crash it then immediately uses the Head Crash attack again in the opposite direction of the first attack.

The Acid Breath attack consists of the leviathan breathing a deadly cone of green acid in front of it with a coned area-of-effect radius, dealing rapid hits of 6,000 typeless damage. This attack can be easily avoided by standing to the sides of the Leviathan's head. It is used at the start of each of its attack rotations. This attack will hit the entirety opposite end of the arena, so players should stay within distance of the main head.

Drops

100% drops

	Item		Quantity	Rarity	GE price	High Alch
	Reinforced dragon bones (m)		1	Always	17,274	0
	Dungeoneering token		500; 5,000	Always	500-5,000	500-5,000

Main drops

	Item		Quantity	Rarity	GE price	High Alch
	Onyx dust (m)		5–20	Common	143,355-573,420	54,000-216,000
	Black stone arrow tips (m)		10–15	Common	9,890-14,835	Not alchemisable
	Black stone heart (m)		1	Uncommon	94,789	96,000
	Huge blunt rune salvage		8–20 (noted)	Uncommon	308,648-771,620	320,000-800,000
	Water talisman		40–83 (noted)	Uncommon	250,520-519,829	80-166
	Draconic visage		1	Rare	1,186,123	450,000

Tertiary drops

	Item		Quantity	Rarity	GE price	High Alch
	The Last Offering (m)		1	Uncommon	0	Not alchemisable

Additionally, a drop from the generic Shadow Reef drop table will be given.

	Item		Quantity	Rarity	GE price	High Alch
	Coins		1,000–15,000	Common	1,000-15,000	1,000-15,000
	Coins		30,000–65,000	Rare	30,000-65,000	30,000-65,000
	Huge spiky rune salvage		1	Common	38,557	40,000
	Huge spiky rune salvage		11–53	Rare	424,127-2,043,521	440,000-2,120,000
	Dark animica stone spirit (m)		1–2	Common	765-1,530	Not alchemisable
	Reef relic (common) (m)		1	Common	4,999	4,999
	Reef relic (uncommon) (m)		1	Uncommon	25,000	25,000
	Logs		1	Common	341	2
	Raw swordfish		1	Common	447	204
	Weapon poison++ (1) (m)		1	Uncommon	8,264	86
	Prayer potion (1)		1	Uncommon	1,736	45
	Reef relic (rare) (m)		1	Rare	1,000,000	1,000,000
	Starved ancient effigy (m)		1	Very rare	Not sold	Not alchemisable

Achievements

• Hail Hydra ( 10) – Hit the Crassian Leviathan using Ice Barrage.
• Hydra Halitosis ( 5) – Defeat the Crassian Leviathan without ever being stunned.
• Get Shredded ( 10) – Defeat the Crassian Leviathan after taking at least 30,000 damage from its sweep attack.
• Harassing the Crassian ( 20) – Defeat the Crassian Leviathan after allowing it to fully regenerate from below half health.
• Of Kraken Ink ( 20) – Collect the following lore books from bosses inside the Shadow Reef.
• Denied the Hydra:
  • Denied the Hydra I ( 5) – Defeat the Crassian Leviathan. (X/5)
  • Denied the Hydra II ( 5) – Defeat the Crassian Leviathan. (X/10)
  • Denied the Hydra III ( 5) – Defeat the Crassian Leviathan. (X/25)
  • Denied the Hydra IV ( 5) – Defeat the Crassian Leviathan. (X/50)
  • Denied the Hydra V ( 5) – Defeat the Crassian Leviathan. (X/75)
  • Denied the Hydra VI ( 5) – Defeat the Crassian Leviathan. (X/100)
• Denied the Hydra Solo Kills:
  • Denied the Hydra Solo Kills I ( 5) – Defeat the Crassian Leviathan while not in a group. (X/5)
  • Denied the Hydra Solo Kills II ( 5) – Defeat the Crassian Leviathan while not in a group. (X/10)
  • Denied the Hydra Solo Kills III ( 5) – Defeat the Crassian Leviathan while not in a group. (X/25)
  • Denied the Hydra Solo Kills IV ( 5) – Defeat the Crassian Leviathan while not in a group. (X/50)
  • Denied the Hydra Solo Kills V ( 5) – Defeat the Crassian Leviathan while not in a group. (X/75)
  • Denied the Hydra Solo Kills VI ( 5) – Defeat the Crassian Leviathan while not in a group. (X/100)

Update history

The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!

• patch 9 March 2020 (Update):
  • Familiars using ranged damage will no longer break the Crassian Leviathan's special attack animations.
• patch 17 February 2020 (Update):
  • Players can no longer receive the first two bosses from Elite Dungeons as Reaper assignments.
• patch 1 April 2019 (Update):
  • Rare drops such as effigies can now be looted more easily after the Crassian Leviathan encounter.
  • The Crassian Leviathan will now consistently drop loot if it dies while swapping sides.
• patch 18 March 2019 (Update):
  • The barrier into the Crassian Leviathan fight will no longer re-open during the fight.
• patch 4 March 2019 (Update):
  • Killing the Crassian Leviathan now correctly awards killcount if you kill it after it has swapped sides.

• update 25 February 2019 (Update):
  • Added to game.

Trivia

• The Leviathan's appearance is based on both the moray eel and the frilled lizard.
  • Due to this, it is the only known Crassian to not have a crustacean or cephalopod-like appearance.
• The Crassian Leviathan is the only boss in all three Elite Dungeons that has no dialogue of its own; this is provided by the Ambassador, who briefly appears at the start of the fight to taunt the player.
• Despite being a Crassian, the Leviathan drops reinforced dragon bones and the draconic visage, which are normally dropped only by dragons. This is likely due to Kranon's blessing of it.