While on Earth in the "Superman II" movie, Non had superhuman strength, virtual invulnerability, superhuman speed, flight, marginal heat vision, and super breath. Non stands at 6'6" and is exceptionally muscled which further augments his superhuman strength to a degree. In recent comics, Richard Donner has portrayed Non's strength as greater than that of General Zod and Ursa put together due to his greater size and muscle mass, possibly outmatching that of Superman and other mature Kryptonians; yet Non is neither as intelligent nor as brutal as the other two and thus cannot exert the full measure of his superhuman strength nor can he improvise its use. The movie version of Non is a birth-defect mute (although his comic-book alter-ego, Kru-El, spoke whole sentences) and appears to also be less intelligent than General Zod and Ursa; as stated by Jor-El, "His only means of expression are wanton violence and destruction."