arch demon piece

Battle 2Move 2

Enemy pieces

arch demon piece
Weak to Lightning

Signature: Abyssal Swing

Weaknesses come straight from the game data (they match the in-game board preview). The star ratings the preview shows for Strength / Intelligence / resistances aren't decoded yet, and attack patterns beyond the signature action aren't in the data at all — that's what the write-up below is for.

Strategy

draft · FC guide · updated 2026-09-12

Mechanics

Arch demon piece.

  • Abyssal Charge — spawns lances that fire line AoEs.
  • Dismember — blue floor lines; dodge into the safe zone once the first set goes off.
  • Abyssal Transfixion — spawns daggers / crosses that explode into circular AoEs.
  • Axe attack — frontal half-room cleave. Stay in the back half of the hitbox.

Source: First Board of the Unbroken Crucible EASY Guide (Legendary Rank & Third Degree), via transcript.