As a result of experiments performed by Keeper Whitman, Killraven possesses enhanced reflexes, strength and stamina.

Keeper Whitman has also implanted a number of artificial memories within Killraven, potentially giving him an encyclopedic knowledge of pre-invasion humanity. The memories have proved difficult to access at will, however, and often have holes in the information. In most subjects Killraven is only capable of general recollections, such as "(President) Kennedy, I know that name."

Keeper Whitman's experiments have given him a form of clairsentience. This manifests as the psionic ability to project his consciousness into Martian minds. The ability has proven difficult to control, occurring at random more often than at will. Killraven has been able to see and feel what a Martian experiences, but has only been able to control the affected Martian once. It was eventually determined that only Martians are affected because the power is weak, and Martians are easier to target due to their natural affinity for telepathy. The sensations are strongest when Killraven kills a Martian, meaning that he too feels the pain of their death.