Blunt Trauma (Jeff the killer x reader)

I've been at Slendermans Mansion ever since the day I lose my mind, Slender had been watching me from afar because he thought I had potential as a killer. Once I passed his expections I rised to be one of the best. What will happen after he brings a new killer into the Mansion.

You are going to be called Grim through the story (you're slightly described but there aren't really any body specific things)

The cover is not my art I got the picture from Pinterest
Most of the art will be listed at the end