Flooded Hypogeum

Beneath the arena, something vast stirs the black water.

A solo dungeon opening at level 25. You fight Drowned Colossus (level 28, magic) round by round rather than in a single resolved swing.

Rewards

Loot rolls the boss drop table, and the run pays Crypt Marks for the Ossuary — the one place in the game that sells guaranteed outcomes. See Dungeons for entry cost, the daily lockout and the exact mark payout, and Drop rates for the odds.