Last updated: 9.0.0

**Thessal the Mermaid Goddess** is the boss of the [Ocean Trench](/wiki/ocean-trench). The boss room has 4 air sources, are protected by a respawning Deep Sea Beast. If you are low hp, try to stay away from these as long as possible. Thessal will throw coral bombs that explode and split into 5 more bombs that explode to inflict more damage. This, combined with her armor breaking attacks, can make this fight a painful one.

Stats

HP: 69000 DEF: 60 EXP: 1518 Location: Ocean Trench Immune to Stasis Counts to God Kills Dungeon Boss

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Combat

Attacks

Damage	Condition effects	Speed (tiles/sec)	Range (tiles)
100	Armor Broken for 2.4s	5.5	8.8
65		7	21
100		6	18
120		6	18

Behavior

Dying Thessal He lives and reigns and conquers the world

He lives and reigns and conquers the world

HP: 10000 DEF: 60 EXP: 0 Counts towards God Kills Level 20 Quest Occasionally and purely randomly, when Thessal is killed she will crumble over the loot bag and ask, "Is King Alexander alive?" If you respond with "He lives and reigns and conquers the world," she will say "Thank you, kind sailor" and spawn 3 coral gifts. Otherwise, after a few seconds, she'll shout "You speak LIES!" and suddenly attack. If you are standing on her (not smart), this will be instant death. Period. Attacks:

Damage	Condition effects	Speed (tiles/sec)	Range (tiles)
100	Armor Broken for 2.4s	5.5	8.8
65		7	21
100		6	18
120		6	18

Reproduction

Spawns:

Coral Bomb Big

Deep Sea Beast

Coral Gift

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Soulbound Drops

As of Build 9, Treasure was added to the drop table. Its uses and types are currently unknown.

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Tips and Strategies

If you have a small group or if you expect the fight to last a long time, it can be helpful to clear the room right before Thessal's so that you have access to an air vent that is not guarded by Deep Sea Beasts. This also prevents unwanted confuse or paralyze enemies joining the fight.

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