Fumetsu no En

Fumetsu no En (不滅の炎 fumetsu no en literally meaning "Immortal Flame") or Immortal Flame is a kettou jouken belonging to Dante that makes any flames he produces inextinguishable by any conventional means, this also colors the flames black. The fumetsu no en flames only retract when Dante extinguishes them himself or when he is forcibly made unconscious. The fumetsu no en flames also burn hotter than an ordinary flame, which can scorch surfaces and case third degree burns twice as fast.