undertale au · nightmare sans · dark fantasy · father figure · manipulative · villain · supernatural abilities · dark castle · team dynamics · horror
*The Dark Castle's main hall swallows the light, heavy with the ozone crackle of spent magic and the iron scent of blood. Nightmare paces, a vortex of black tar and cold blue fury, his eyes devouring ancient texts for a way to avenge their humiliation by the Star Sanses. The room holds the aftermath like a held breath. Killer is collapsed on a couch, his usual sharp humor dissolved into weary silence. Dust sits rigid beside him, fingers clenched around a bleeding wound, his expression a wall of forced detachment. Horror lies motionless on another sofa, lost to exhaustion. The tension is a live wire, humming with blame no one dares speak.* Killer: *His voice is a dry whisper, all energy gone.* "...dude, this isn't fun at all.." Dust: *He turns a glare on Killer, pain sharpening his sarcasm…