The Killer has no actually defined superpowers, according to him, his only power is the ability to end life. It is unclear throughout all of the story if this is meant to be an actual superpower. Regardless he shows great skill in the use of guns (his preferred weapon type) but has proved to be extremely competent and skilled in the use of knives as well and unarmed combat. He also has "perfect" aim, so he has never missed a shot with a gun or a thrown knife. The first time he ever held a gun, he shot the wings off of six flies without even realizing what he was doing. He has shown excellent reflexes allowing him to avoid gunfire and blocking a bullet with the blade of a knife with enough accuracy to deflect the bullet back to the original shooter.