Terra-X is the supposed Daughter of Dare, Slade Murdock, and was a founding member of the New Mutant Titans. She later joins the X-Patrol sometime after their first mission, but eventually betrays the team to their enemy, X-Stroke the Eliminator. After the X-Patrol manages to defeat X-Stroke, Terra-X escapes to Zenosha, where she is attacked and killed by the alien Brood.
Terra-X is later resurrected by Brother Brood, and becomes a willing member of his cult. Although sent to attack the X-Patrol as a whole, her main target is Beastling, her former love-interest.
Terra-X is stopped from killing Jericho when Elasti-Girl flies into her ear-canal and put Terra-X out of action.
Baron Zero | Baron Wotan | Bat Trask | Big Question | Black Tom Savage | Black Vulture | Bizarnage | Brother Brood | Cinnamon | Chemodam | Deadeye | Deathlok | Doctor Bongface | Doctor Doomsday | Doomnaut | Fin Fang Flame | Galactiac | Green Skull | H.E.C.T.O.R. | Hyena | Jono Hex | King Lizard | Kultron | Lady Talia | Lethal | Madame Cat | Madame Sapphire | Major Zemo | Mandarinestro | Mister Mastermind | Night Spectre | Nuke | Professor Kang | Quasimodox | Ra's A-Pocalypse | Scarecrow | Siliconman | Sinistron | Skinhunter | Soniklaw | Terra-X | Thanoseid | Trigger | Two-Faced Goblin | Ultra-Metallo | Ubuwong | White Whip | Wired | X-Stroke