Tsoagoth, The Brine King

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"The Brine King" redirects here. For quest, see The Brine King (quest).
Tsoagoth, The Brine King
Tsoagoth, The Brine King
Location(s) The Brine King's Reef
Quest(s) The Brine King
Resistance(s) Resists Elemental Damage
Resists Chaos Damage
Skill(s) Tide Rush

Tsoagoth, The Brine King is the final boss of act 6, located in the Brine King's Reef.


Defeating him is part of the quest The Brine King.


Tsoagoth is a challenging boss to strategize for, as his abilities intentionally remove the option of kiting (running out of damage zones) from the player. This boss acts as a stat check on your build. If you do not have enough lightning resistance and cold resistance, you are highly likely to die from a one-shot by a combination of lightning strikes and orbs of water. In order to deal with this, it is critical to max out your lightning and cold resistances by temporarily equipping a Topaz Ring or Topaz Flask and Sapphire Ring or Sapphire Flask, in addition to having at least 1000 health and appropriate life flasks


The stage and abilities change as the fight progresses.

At 100% health


Tsoagoth raises his claw and whacks the ground, creating a medium-ranged shockwave.

Tidal Rush

Tsoagoth enters a defensive stance for 5 seconds, gaining 80% damage reduction, and damaging nearby enemies. During this period, Tsoagoth is 40% slower, can only melee, and will constantly summon Brine Spawn.

At 75% health

Flood Arena (1)

Upon reaching 75% health, Tsoagoth shrinks the arena with tidal waves. He is untargetable while the stage is shrinking. Tidal waves apply Cold Degen (a cold modifier of Degeneration Aura) on contact. For the duration, lightning will strike the ground, while orbs of water come out of the waves. Even after the effect ends, orbs of water will continue to come out of the waves. The arena returns to a larger size, although smaller than it was originally.

At 50% health

Flood Arena (2)

Upon reaching 50% health, Tsoagoth shrinks the arena again, more than before. This time, however, lightning does not strike the ground, and there are no orbs of water.


Tsoagoth is capable of attacking in an arc. It applies the Maim status, reducing movement speed by 30% for 4 seconds.

At 25% health

Flood Arena (3)

Upon reaching 25% health, Tsoagoth shrinks the arena yet again, and more than the previous time. In this final phase of the fight, Tsoagoth will no longe ruse Tidal Rush. Instead of orbs of water, lightning will constantly strike the ground in random places until the end.

Divination cards

The following divination cards can drop from this monster:


Map variants

Nassar, Lion of the Seas in Reef MapReef MapMap Level: 70
Map Tier: 3
Guild Character: 7
Each plank of rotting wood, each dead sailor, feeds the island and makes it grow.Travel to this Map by using it in a personal Map Device. Maps can only be used once.

Version history

Version Changes

Added to the game