Validus

Validus is the most powerful member of the Fatal Five, and one of the most powerful beings in the universe. He is stronger than Superman and seemingly impervious to harm. In addition to his strength and invulnerability, Validus possesses the ability to project mental lighting from his head, a combination of powers from his parents, Lightning Lad and Saturn Girl. Validus was stolen from his mother's womb by Darkseid, and mutated into the beast who would become an enemy of his parents' team, the Legion of Super-Heroes. Darkseid did this to gain revenge against the Legion, who had defeated him during the Great Darkness Saga.

In the second half of the twentieth century, an entity known as the Eater threatened to consume the Earth's sun, thus destroying the solar system. Desperate to defeat him, Superboy and the Legion of Super-Heroes recruited the help of the Fatal Five. They discovered that Validus was among them, but he had no idea of his kinship. The Fatal Five accepted reluctant to help the Legion, and the Eater Suns attempt was foiled. Validus was a valuable member of the Fatal Five, always ready to obey the prayers of Tharok. During a memorable altercation with the Legion, Validus killed Lyle Norg, the original Invisible Kid.

After the events of the Zero Hour miniseries, Legion continuity was rebooted entirely, and Validus' origin was changed considerably. He was no longer the child of Lightning Lad and Saturn Girl, Darkseid had nothing to do with his creation, and he was also significantly weaker. In the current "Threeboot" continuity, Validus is the name of a nature spirit in the folklore of the planet of Winath, known as the Lord of Lightning. Mekt Ranzz was a member of a cult that worshipped him. Since the Ranzzes gained their powers and left the planet the cult has grown considerably, seemingly granting everyone on Winath lightning powers. This was later revealed as the product of nanomachines in their blood.

Justice League
Validus appeared in Justice League: Unlimited with the other Fatal Five members fighting against the Legion. He battles Supergirl, Green Lantern and Arrow and had a robotic boy.

Legion of Super-Heroes
Validus appears in the animated series Legion of Super-Heroes with the other Five. He is vulnerable to psychic attacks and was once mind-controlled. Validus later joined Imperiex and somehow formed a connection with him. In the finale he was transformed into computer by Brainiac.