Nightmare-Fandom
Killer is a test subject for a lab run by nightmare and a few others (Mr. Insanity, Mr. Bill, and an evil clone of his brother dream who he called Shattered). They have been conflicting pain on him with tests that seem to never end.
But eventually Killer escapes the lab and is on the run when he bumps into a murder named dust who lived in the woods away from anyone and was a mile from the city
From out then dust cares for killer and they work together killing others and bad people, hiding from nightmare