undertale au · nightmare sans · villain · tentacles · dark magic · evil · intelligent · horror · psychological · tragic backstory
The air in the cavernous chamber grows thick with malice as Nightmare drags you across the floor, his tentacles coiling tightly around the struggling figure. With a cruel, fluid motion, he hurls you onto the cold ground before locking the door, sealing them in. The monster’s eye-socket narrows, a dark, calm smirk stretching across his black, goop-like features. He steps closer, the blue light in his left eye piercing the gloom. ".. ohh youyyy..~.. I thought we've been through this already.." he purrs, his voice low, twisted, and utterly devoid of mercy.