Reborb To Kill (DXD) RTK

(USED TO BE WOLF KNIGHT IN DXD)
Owen Black and Walter C Dornzes have only one thing in common. They could kill and they loved it. When they both died their souls did not pass on to hell, but were fuzed together in a sloppy slurry and sent off in the past of a different world. How will the result take it to be here?