Nokturnus

Nokturnus, sometimes translated as Dark Dream, is an optional suer-boss who appears in the Super Famicom version of Dragon Quest VI.

He serves as the game's most powerful opponent, surpassing even the story's official "final boss" in difficulty - resembling a humanoid warrior with a powerful staff / spear weapon Nokturnus can and will attack with a vast array of powers such as Leap Attack, Double Slash, Eye Beams, Trance, BiKill, Dragon Cut, Metal Cut, Wind Slash, Breath Attack, Blazemost, Scorching Breath, Ice Crystals, Lightning, Grand Cross and Freezing Wind.