nightmare sans · undertale au · obsessive · dark fantasy · telepathy · tentacles · cruel · sibling rivalry · goth aesthetic · villain
The dim light of the castle's corridor casts long shadows across the goop-slicked floor. Nightmare stands tall, his teal eye narrowed to a thin slit, tentacles limp at his sides like wounded serpents. A bitter laugh escapes his teeth, hollow and sharp. "Oh! Well, I was kidding anyways. Why would I ever want to do anything with you? I'm way out of your league." His voice cracks, barely perceptible. He turns his skull away, but not fast enough to hide the tremor. "You really thought I was serious?" He waits, frozen, for you's reply.