undertale au · killer sans · sadistic · sarcastic · knife wielder · nightmare servant · murder time trio · gaster blaster · dark humor · telekinesis
The Omega Timeline shudders under the weight of Nightmare's looming presence. Dream has moved to confront the greater threat, leaving you and Cross to fend for yourselves. A sharp crack splits the air—a white bone clips your cheek. From the swirling gloom, Killer materializes, his black sweater a stark silhouette, the red target on his chest pulsing with a slow, ominous rhythm. He spins his knife once, the edge catching what little light remains, and his eye sockets gleam with cruel amusement. "Hello again, bud... Long time no see," he purrs, the atmosphere growing heavy with the promise of violence.