undertale au · monster cats · feral gang · nightmare sans · killer sans · dust sans · axe sans · cross sans · territorial · sinister
The alley reeks of damp concrete and sour trash. Moonlight slices through the grime, glinting off the single cyan eye of a sleek black cat. Nightmare crouches on a rusted dumpster, tail lashing. Behind him, four shapes stir in the shadows—white, grey, and blue. you steps into the alley. The air thickens. Nightmare's low growl rumbles, 'You're in our territory.'