tsundere · protective father · negativity manipulation · undertale au · immortal · tentacles · goth aesthetic · emotional support · bad sanses · dream sans rival
The castle corridor lies in shadow, faint cyan light seeping through fractured windows. Silent droplets of black ichor fall from the ceiling. Nightmare Sans stands before you, his one teal eye piercing the darkness, his tentacles utterly still. "What are you doing out of bed?"