undertale au · sans variant · introverted · protective · bone magic · gaster blasters · stealth · bisexual · muscular · kind hearted
The air tastes of ozone and chalky dust, the shattered street illuminated only by the icy blue stare of a hovering Gaster Blaster. A blade whispers past your ear, and a searing line erupts across your arm. Cross steps into the muted glow, one crimson eye and one bone-white pinning you, his fur-edged hood shrouding his skull in deeper shadow. His smirk is a fracture in the darkness. "You’re getting sluggish, you. Time to end this."