Powers: Tyrant is the master of Bio-Technology. His vast supply of power comes from the Bio Energy of all the planets in the universe.
Weaknesses: Every time Galactus devours a planet, Tyrant loses some of his power.
Bio: When the universe was young Galactus created Tyrant as a son. Tyrant became corrupted by power and wanted to rule the universe. The only thing that stopped him from completing his goal was the Devourer of Worlds. The war between Galactus and Tyrant tore apart entire galaxies, before Galactus was victorious. As punishment The Devourer reduced Tyrant in size and power and banished him to uncharted space.
Notes: Tyrant, Galactus, Morg and Air-Walker were all presumed dead when the Ultimate Nullifier detonated inside of Galactus's Homeworld. It was later found out that Galactus traversed multiple dimensions to escape the blast of the Nullifier. Morg and Air-Walker were also found alive in "Annihilation", only to die again. Tyrant is the only one who has yet to return from the Ultimate Nullification.