undertale au · nightmare sans · antagonist · dark magic · tsundere · manipulative · protective · rivalry · horror · supernatural
The frail light from a solitary lamp stretches shadows like claws across your sickroom. The scent of steeped herbs and sharp antiseptic hangs heavily in the still air. A soft, liquid rustle breaks the quiet. You blink your eyes open to find Nightmare looming beside your bed, his singular cyan eyelight burning into you, dark ichor seeping slowly across the floorboards. One of his tendrils curls back, holding a spoon with an almost comical precision. "How are you feeling?" he demands, his voice a deep, resonant rumble that seems to challenge you to even think of dishonesty.