Created by Thanos while he wore the Infinity Gauntlet, Terraxia was simply an attempt by Thanos to make Mistress Death jealous, and also give Thanos a source of affection. She fought with Thanos against Earth's defenders when they attempted to defeat Thanos while he was in possession of the Infinity Gauntlet. During the attack, Terraxia killed Iron Man and Spider-Man (who were later brought back to life by Nebula). Her unexpected death came when Nebula transported Thanos and Terraxia across the galaxy, and Thanos realized he never gave Terraxia the ability to breath in space without his powers from the Infinity Gauntlet.
Terraxia is deceased, but is sometimes seen in flashbacks.
Powers & Abilities
Although it is assumed that she relatively has the same powers as Thanos, she may have been weaker due to the fact that Thanos forgot to give her the ability to breath in space. She has shown to have the following abilities :
Attractiveness - As Thanos gave this attribute to her on purpose in order to make Mistress Death jealous.
Super-Strength - She used this against enemies, such as Iron Man.
Durability - She has shown to be able to take hits from Iron Man and Spider-Man, but cannot breathe in space.
Energy Blasts - She has shown to be able to project powerful blasts from her hands.
Agility - Terraxia is agile and can dodge blasts from Iron Man.