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Glacius, the Frozen Wyrm

Boss

Fought on floors 60 and 70, in Act 4: The Frozen Reaches. Floor 70 is this act's climax fight.

Who They Were

The last god of a world called Isvaar, whose sun she ate before she ever touched the ground. Its worshippers followed it down into her and still kneel in the ice, praying to a god who cannot warm them and a sun that will not come back.

Mythic, cursed, and divine relics sit above legendary, the fusion ceiling, and drop only from boss and guardian kills: mythic from floor 50, cursed from floor 80, and divine from floor 90, but only on Infernal. Here, a mythic relic can drop from its floor 60 and 70 kills.

Abilities

Frostball

Frostball

Targets all-enemies · 2s cooldown

Magic damage to all foes; may stun.

  • damage, power 10 + 0.9×magic
  • status, applies Stunned (stun, 1 turn), 35% chance
Arcane Bolt

Arcane Bolt

Targets enemy · No cooldown

A reliable single-target magic missile.

  • damage, power 6 + 1.1×magic
Rejuvenation

Rejuvenation

Targets all-allies · 2s cooldown

Heals the whole party a little now and grants regen.

  • heal, power 8 + 0.4×magic
  • buff, applies Regeneration (hot, 3 turns)

Statuses It Inflicts

Inflicts: StunnedStunned RegenerationRegeneration

How to Prepare

  • You fight Glacius, the Frozen Wyrm solo, and there is no rest heal before the encounter, so arrive with real HP in the bank and sustain already flowing: lifesteal earned in the fight itself, plus potions bought with gold beforehand.
  • An escort wave of the biome's regular enemies fights first. Only after they fall does Glacius, the Frozen Wyrm step out alone for the closing wave, so keep enough HP and cooldowns in reserve for the real fight.
  • Its kit includes a heal. It fights its own wave alone, so that heal restores its own HP: bring enough sustained damage to outpace it, not just one big burst.
  • It can buff its own stats mid-fight, so the fight gets tougher the longer it drags on, not easier.
  • It can stun you, skipping one of your turns outright, so don't fight this one on a razor-thin HP margin.
  • This fight tightens further on higher difficulties, especially Nightmare.
  • If you wipe, you restart at floor 1, but your permanent upgrades and talents carry over, so a loss here is a setback, not a full reset. Optional Hardcore mode also destroys your equipped gear on a wipe.