"If This be Terrax"
The FF find themselves on a strange planet where the natives are harassed by evil guards and the mere thought of resistance means death. The FF resists but the locals subdue the super heroes before they all are sentenced to death. The FF are brought before the ruler of the planet, a tyrant named Tyros. Tyros tries to intimidate the FF but does not realize their powers as they escape their bonds and take the fight to the tyrant. After the show of force, Tyros is left groveling in a corner like a coward as Galactus pulls them all back to his ship. Galactus then transforms the dictator into his new herald, Terrex. Galactus pledges his support to help Earth, before he devours it as they all head back to Earth for the showdown between Galactus and the Sphinx.
1st appearance of Terrax The Tamer