Terrax
REAL NAME: Tyros the Terrible

Chosen by the world-devouring Galactus to be his latest herald. Tyros the Terrible was endowned with complete control over all forms of rock as well as the power of interstellar flight. Soon, though, Tyros, now Terrax, tired of serving his master and rebelled, only to be stripped of his cosmic powers. Since then, Terrax has regained his earth-shattering energies and has used them to wreak havok on the galaxy, hoping someday to conquer the universe and again gain vengeance upon his former master.

In the beginning...
Tyros was the despotic ruler of his homeworld, until Galactus removed him form it!