Bosses

The descent throws 16 boss-tier floors at a solo hero across 6 act-climax bosses and 6 mid-act guardians. Some act bosses stand on more than one boss floor within their own act. Every boss and guardian floor adds one extra final wave: an escort of the biome's regular enemies fights first, then the boss or guardian alone. See Biomes & Floors for the full 100-floor structure.

Floor	Act / Biome	Boss	Type
10	Act 1: Verdant Ruins	Gnarlroot, the Elder Treant	Boss
14	Act 1: Verdant Ruins	Thornclad Warden	Guardian
20	Act 2: Lightless Caverns	The Hollow King	Boss
28	Act 2: Lightless Caverns	Gloomfang, the Cavern Sentinel	Guardian
30	Act 2: Lightless Caverns	The Hollow King	Boss
40	Act 3: The Undead Halls	Mortis, the Bone Tyrant	Boss
46	Act 3: The Undead Halls	The Grave Keeper	Guardian
50	Act 3: The Undead Halls	Mortis, the Bone Tyrant	Boss
60	Act 4: The Frozen Reaches	Glacius, the Frozen Wyrm	Boss
64	Act 4: The Frozen Reaches	Rime Sentinel	Guardian
70	Act 4: The Frozen Reaches	Glacius, the Frozen Wyrm	Boss
80	Act 5: The Molten Depths	Pyraxis, the Molten Lord	Boss
82	Act 5: The Molten Depths	Cinderback Warden	Guardian
90	Act 5: The Molten Depths	Pyraxis, the Molten Lord	Boss
96	Act 6: The Abyss	The Hollow Watcher	Guardian
100	Act 6: The Abyss	Nyxara, Devourer of Worlds	Boss

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