Voidforge Overseer
GuardianFought on floor 82, in Act 5: The Voidforge.
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, mythic and cursed relics can both drop from its floor 82 kill.
Abilities

Frostball
Magic damage to all foes; may stun.
- damage, power 10 + 0.9×magic
- status, applies Stunned (stun, 1t), 35% chance
Statuses It Inflicts
Inflicts:
Stunned
How to Prepare
- You fight Voidforge Overseer 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 Voidforge Overseer step out alone for the closing wave, so keep enough HP and cooldowns in reserve for the real fight.
- It can stun you, skipping one of your turns outright, so don't fight this one on a razor-thin HP margin.
- 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.