Radioactive Man

Radioactive Man is a radiation-based super villain. He was in the Cube before the Breakout happened. He possesses radioactive powers that allows him to withstand the mighty hurl of Mljohnir from Thor's attack, shoot radioactive blasts and absorb nuclear energy.

When the Radioactive Man fought Iron Man, Thor, and Black Panther inside the Stark Tower, he nearly bested them all until when he tried to absorb the Arc Reactor's power, he was defeated by the trio.

His fate was unknown whether he was taken to the Negative Zone or escaped after the ancient Asgardian winter unleashed upon Earth.

In Ultima, Kang broke the Radioactive Man out of the Negative Zone prison in exchange for becoming an army general of the Kang Conquerer Armada. The Radioactive Man nodded in agreement, and was accepted into the ranks of the armada. Later on, Wiseman will transform Radioactive Man into a stronger form in order to make him one of his slaves in his secret plot to destroy the entire multiverse timestream.