Despite his Deviant heritage, Kro possesses a number of superhuman traits characteristic of an Eternal. Kro maintains a virtually unbreakable mental control over the processes and structure of his body even when he is asleep or unconscious. As a result, Kro has a lifespan that has already lasted over 100,000 years and is immune to disease and aging. His mental control over his body enables him to maintain a youthful, vigorous physical condition. Kro is not as nearly indestructible as the Eternals. (For example, Ikaris nearly killed Kro once by strangulation.) But while sufficient force can kill Kro, he can use his mental control over his body to heal himself after being injured.