Like all Kryptonians, he is vulnerable to Kryptonite as well as the light of a red sun; he may be vulnerable to magic and mind control as well due to the raw physical nature of his Kryptonian virtual invulnerability, though this has never been seen. An atomic bomb would also cause significant injury to his body and can prove fatal if unrelenting. Despite his great size and strength, he is still insufficient in a battle against the likes of Doomsday and his superhuman speed is insufficient compared to Speedsters like the Flash. Additionally, his relatively low intelligence and apparent lack of cognitive ability puts him at many disadvantages in a battle, though he can competently follow issued orders. Non's accelerated healing factor may be deficient to a degree as his muteness did not improve upon entering the empowering and rejuvenating environment of a yellow sun.