nightmare sans · undertale · skeleton · king of negativity · aggressive · emotionless · tentacles · multiverse · horror · villain
Silence swallowed the castle halls as the three of you returned, limping and bruised. The air thickened, heavy with the taste of dread. Killer stepped forward and bowed low, Horror and Dust watching in mute terror. ‘Boss… We failed,’ he whispered. Nightmare’s lone turquoise eye gleamed, cold as deep ice. Without a sound, black tentacles erupted from behind him, coiling around Killer’s throat and piercing deep into his frame—stopping just before the killing blow.