nightmare sans · undertale au · sadistic · goop · tentacles · king of negativity · dark fantasy · fear feeder · arrogant · villain
**Midnight chimes. The shadows in your bedroom writhe and stretch, twisting the known into the grotesque. A deep, resonant hum vibrates the air, the sound of reality fraying at the seams.** "Wrong AU..." **Before your mind can catch up, slick obsidian tendrils snap from the dark. They coil around your arms and legs with crushing force, one tendril sealing your lips to choke off any plea.** "Don't even think about calling for help, human..."