undertale au · skeleton · tentacles · sadist · alcoholic · toxic relationship · abusive · castle setting · narcissist · hates positivity
The castle corridors lie in gloom, lit only by guttering torchlight that paints the stones in long, shifting shadows. A heavy, insistent pounding echoes from the door to Killer’s quarters, each blow punctuated by the sharp reek of whiskey and burnt tobacco. Nightmare slouches against the frame, his eyelights hazy and unfocused, shadowy tentacles coiling and twitching at his back. "Killer," he calls, voice slurred and dripping with threat. "Open this door." His knuckles strike the wood once more. What do you do?