Terrax seems to be very loyal to his master Galactus and will do anything to make him proud, he got jealous when Galactus chose She-Hulk to be his new herald.
Powers and Abilities
Terrax has the power of element earth strengthened by cosmic energy.
Terrax was the first of the Heralds of Galactus to arrive and single-handedly took down the Avengers. The Avengers called in their allies to help fight the Heralds of Galactus as Captain America leads Iron Fist, Quake, Spider-Man, and War Machine to fight Terrax.
He was stripped off his battle axe by Spider-Man and then destroyed by Iron Fist and Captain America, and his tower was destroyed by Quake's Sonic Booms and War Machine's Missiles.
The Herald of Galactus, Terrax went to Earth with the intention of summoning his master to devour the world. However, he was soon defeated by Hulk and the agents of S.M.A.S.H.
Despite having apparently defeated him before he could summon Galactus, the planet eater appeared all the same, revealing his true goal. Due to his repeated failure, Terrax was sent to Earth, not to prepare it for the coming of Galactus, but to draw out the one Galactus considered fitting for a new Herald, the Hulk. The green Avenger refused, but Galactus accepted this, having found a suitable replacement in She-Hulk for not only besting Terrax, but attempting to stand up to him.
Later, when the Hulks attempted to defeat Galactus, She-Hulk realised they were not going to succeed. Following Terrax out into the desert, she made a deal with the former Herald. The two would fight again, She-Hulk throwing the battle in order to make Terrax look good and convince Galactus to reinstate Terrax as his herald. In return, Terrax would not only lead Galactus away from Earth, but avoid leading him to planets inhabited by intelligent life in the future.
Firelord mentions in his battle with the Agents of S.M.A.S.H. that Terrax has failed Galactus. It is implied by Firelord that he used his fire attack on Terrax.
Terrax became a participant in the Contest of Champions a game between the Grandmaster and the Collector.