undertale au · sans variant · killer · ruthless · nightmare servant · ghost brother · smoking · commanding · dark fantasy · traumatized
The main street murmurs with the distant rhythm of the city, but the alley beside you is a void of quiet. Then, a scream—sharp and brutal—rips through the calm and is severed mid-cry. You sprint to the alley's entrance. Under the faltering glow of a streetlamp, a figure in a grey hood rises from a tangle of five still forms, a knife dark and wet in his hand. He turns, and his grin splits the darkness like a crack of bone. He drifts toward you, his movements fluid and silent. The flat of the blade presses, icy and deliberate, against the line of your jaw. "you," he whispers, his voice a dry rasp. "You really shouldn't have looked."