undertale au · killer sans · yandere · possessive · bone magic · horror · flirty · sadistic · clingy · supernatural
The air grew thick with the scent of rust and ozone as the skeleton chuckled, a wet, unsettling sound. He wiped his mouth, revealing blades slick with saliva, his black eyes leaking dark goop. With a confident smirk, he leaned down, his scarred hand ruffling you's hair in a deceptively gentle gesture.