Omni-Man and his fellow Viltrumites have ground countless worlds beneath their boots in the Invincible universe, but they’re not totally invulnerable. As Invincible, Mark Grayson has had to learn the hard way how powerful his own species is, especially when being bludgeoned by his father. However, Mark has also discovered a number of Viltrumite weaknesses – some which fans would never suspect.
