Crassian Leviathan

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For the achievement, see Crassian Leviathan (achievement).
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This article has a strategy guide.
All information on mechanics, setups, and tactics is on the subpage.

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[edit | edit source]

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[edit | edit source]

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[edit | edit source]

100% drops[edit | edit source]

Item Members Quantity Rarity GE price High Alch
Reinforced dragon bones.png: RS3 Crassian Leviathan drops Reinforced dragon bones with rarity Always in quantity 1Reinforced dragon bones (m)P2P icon.png1Always16,0830

Main drops[edit | edit source]

Item Members Quantity Rarity GE price High Alch
Onyx dust.png: RS3 Crassian Leviathan drops Onyx dust with rarity Common in quantity 5-19Onyx dust (m)P2P icon.png5–19Common81,170-308,44654,000-205,200
Black stone arrow tips.png: RS3 Crassian Leviathan drops Black stone arrow tips with rarity Common in quantity 10-15Black stone arrow tips (m)P2P icon.png10–15Common11,340-17,010Not alchemisable
Black stone heart.png: RS3 Crassian Leviathan drops Black stone heart with rarity Uncommon in quantity 1Black stone heart (m)P2P icon.png1Uncommon96,16996,000
Huge blunt rune salvage.png: RS3 Crassian Leviathan drops Huge blunt rune salvage with rarity Uncommon in quantity 8-20 (noted)Huge blunt rune salvageF2P icon.png8–20 (noted)Uncommon309,680-774,200320,000-800,000
Water talisman.png: RS3 Crassian Leviathan drops Water talisman with rarity Uncommon in quantity 40-83 (noted)Water talismanF2P icon.png40–83 (noted)Uncommon136,400-283,03080-166
Draconic visage.png: RS3 Crassian Leviathan drops Draconic visage with rarity Rare in quantity 1Draconic visageF2P icon.png1Rare1,162,519450,000

Tertiary drops[edit | edit source]

Item Members Quantity Rarity GE price High Alch
The Last Offering.png: RS3 Crassian Leviathan drops The Last Offering with rarity Uncommon in quantity 1The Last Offering (m)P2P icon.png1Uncommon0High Level Alchemy icon.pngNot alchemisable

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

Item Members Quantity Rarity GE price High Alch
Coins_10000.png: RS3 Crassian Leviathan drops Coins with rarity Common in quantity 1000-15000CoinsF2P icon.png1,000–15,000Common1,000-15,0001,000-15,000
Coins_10000.png: RS3 Crassian Leviathan drops Coins with rarity Rare in quantity 30000-65000CoinsF2P icon.png30,000–65,000Rare30,000-65,00030,000-65,000
Huge spiky rune salvage.png: RS3 Crassian Leviathan drops Huge spiky rune salvage with rarity Common in quantity 1Huge spiky rune salvageF2P icon.png1Common38,41140,000
Huge spiky rune salvage.png: RS3 Crassian Leviathan drops Huge spiky rune salvage with rarity Rare in quantity 11-51Huge spiky rune salvageF2P icon.png11–51Rare422,521-1,958,961440,000-2,040,000
Dark animica stone spirit.png: RS3 Crassian Leviathan drops Dark animica stone spirit with rarity Common in quantity 1-2Dark animica stone spirit (m)P2P icon.png1–2Common2,826-5,652Not alchemisable
Reef relic (common).png: RS3 Crassian Leviathan drops Reef relic (common) with rarity Common in quantity 1Reef relic (common) (m)P2P icon.png1Common4,999High Level Alchemy icon.png4,999
Reef relic (uncommon).png: RS3 Crassian Leviathan drops Reef relic (uncommon) with rarity Uncommon in quantity 1Reef relic (uncommon) (m)P2P icon.png1Uncommon25,000High Level Alchemy icon.png25,000
Logs.png: RS3 Crassian Leviathan drops Logs with rarity Common in quantity 1LogsF2P icon.png1Common3182
Raw swordfish.png: RS3 Crassian Leviathan drops Raw swordfish with rarity Common in quantity 1Raw swordfishF2P icon.png1Common311204
Weapon poison++ (1).png: RS3 Crassian Leviathan drops Weapon poison++ (1) with rarity Uncommon in quantity 1Weapon poison++ (1) (m)P2P icon.png1Uncommon8,75686
Prayer potion (1).png: RS3 Crassian Leviathan drops Prayer potion (1) with rarity Uncommon in quantity 1Prayer potion (1)F2P icon.png1Uncommon1,02645
Reef relic (rare).png: RS3 Crassian Leviathan drops Reef relic (rare) with rarity Rare in quantity 1Reef relic (rare) (m)P2P icon.png1Rare1,000,000High Level Alchemy icon.png1,000,000
Starved ancient effigy.png: RS3 Crassian Leviathan drops Starved ancient effigy with rarity Very rare in quantity 1Starved ancient effigy (m)P2P icon.png1Very rareNot soldNot alchemisable

Achievements[edit | edit source]

Update history[edit | edit source]

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 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.

Trivia[edit | edit source]

  • The Leviathan's appearance is based on both the moray eel and the frilled lizard.
  • The Crassian Leviathan is the only boss in all three Elite Dungeons that has no dialogue of its own. Instead, The Ambassador appears and speaks some dialogue at the beginning of the encounter.
  • Despite being a Crassian, the Leviathan drops reinforced dragon bones and the draconic visage, which are normally dropped only by dragons.