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Vulkar, the Furnace Colossus

Boss

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

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

Fireball

Fireball

Targets aoe · 1000-turn cooldown · Hits 2

Hurls a fireball that splashes magic damage and ignites foes.

  • damage, power 14 + 1.3×magic
  • status, applies Burning (dot, 2t)
Triple Shot

Triple Shot

Targets enemy · 2000-turn cooldown

Three swift arrows at one enemy.

  • damage, power 8 + 0.8×attack
  • damage, power 8 + 0.8×attack
  • damage, power 8 + 0.8×attack
Bless

Bless

Targets all-allies · 2000-turn cooldown

Raises the attack of all allies for 3 turns.

  • buff, applies Blessed (buff, 3t)

Statuses It Inflicts

Inflicts: BurningBurning BlessedBlessed

How to Prepare

  • You fight Vulkar, the Furnace Colossus 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 Vulkar, the Furnace Colossus step out alone for the closing wave, so keep enough HP and cooldowns in reserve for the real fight.
  • It can buff its own stats mid-fight, so the fight gets tougher the longer it drags on, not easier.
  • It can inflict Burning, damage that keeps ticking after the hit lands, so don't count only your burst; a dragged-out fight bleeds you too.
  • It carries a ramping enrage from its very first turn: the longer the fight runs, the more true damage it drains from you every turn, so do not stall.
  • Its Void Aegis caps every single hit you land to 12% of its own max HP, so no single burst can delete it early. Expect a longer fight than your raw damage numbers suggest.
  • 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.