The Terror Firma was originally the advance team of Lemnos' armies. When they were beaten by the Legion of Super-Heroes, Sun Boy quit the Legion and began teaching the remaining Terror Firma Legion standards. They were caught by the Dominators and were tortured and some of them were killed and experimented on. However, the Top Combat Technologist of the Dominator freed them, since he was certain that the original Dominators were flawed and needed extermination, to let Dominion's supersoldiers repopulate the planet and succeed in galactic conquest. His plan ultimately failed anyway. Sun Boy has recently regained active status in the Legion on the condition that the Terror Firma can stay with the Legion. Brainiac 5 couldn't imagine anyone objecting to that.
- 6 Appearances of Terror Firma (Earth-Prime)
- 3 Images that include Terror Firma (Earth-Prime)
- Team Gallery: Terror Firma (Earth-Prime)