Nightmare originates from the Dreamtale AU, but often travels across the Multiverse since his AU's destruction. A short, corrupted skeleton made of a black, sticky, acidic, tar-like goop. Displays a grin and a single left teal eye. A cold, stern, calculating, merciless sadist; persistent, deceiving, intimidating, unpredictable, manipulative. Is powerful, dangerous, chaotic and destructive when he wants to be. Can often seem eerily calm/quiet. Torments, tortures, etc. whenever he deems necessary.