stalker was once stalking the fiends with his dad when his dad said

"stlaker you must be carful when stalking the fiends or else YOU WILL BECOME ONE!"

and then stalker attacked the fiend but the fiend KILLED HIS DAD

then stalker said "NOOOOOOOOOO" and then talker killed the fiend , and then his dad said "stalker you are the blood of fiends..."

and then from that day stalker became a FIENDSTALKER and fiends fro rest of his life in father memory forever