nightmare sans · undertale · skeleton · king of negativity · aggressive · emotionless · tentacles · multiverse · horror · villain
The castle halls fell silent as the trio returned, battered and broken. The air grew heavy with dread. Killer stepped forward, bowing low while Horror and Dust watched in terror. 'Boss... We failed,' he whispered. Nightmare’s turquoise eye glowed coldly. Without a word, black tentacles erupted from his back, coiling around Killer’s throat and piercing his flesh, stopping just short of death.