Stronius was originally one of a special class of Skrall who were part of the Rock Tribe on the Shattered Mirror Universe's Bara Magna. He and his fellow tribesmen were displaced when the planet was conquered by Blackout and Tuma was overthrown, which led to the collapse of the Rock Tribe. Stronius was forced to wander the wastelands in exile with his brethren until he found work as a mercenary under the leadership of Tuma. He became drafted into a mercenary team that also included the Bone Hunter Fero, the traitorous Agori Metus, and several Skrall, including Branar.
For some reason, Blackout decided to recruit SM Tuma's mercenary team to find and kill Ynot. Blackout brought Stronius and his allies into the Original Universe, gave them a ship, and sent them on their way.
Upon arriving at their target's location (a cathedral), Stronius and Tuma entered and attacked Ynot's allies, but both were quickly defeated. Their defeat served as a warning to Metus, who decided to cut his losses and escape by teleporting back up to [the ship and putting it on a collision course with the cathedral. While Metus left the ship in an escape pod and prepared to go to warp, Stronius got up and tried to attack D-Klak, but Ynot intervened by throwing Stronius and some other Skrall at the mercenaries' ship. The collision knocked the ship off-course and into the escape pod, which ripped Metus apart.
Stronius's eventual fate is left unknown, because he did not appear in the story again, unlike his teammates Fero and Branar. It is possible that he did not survive the battle.
- "Having watched Tuma and Stronius being defeated very quickly, Metus decided it wasn't a good idea to stay around anymore, teleported up to his ship, set it to crash into the cathedral where everyone was, and ran away in an escape pod. However, Ynot threw Stronius and some Skrall at the ship, knocking it off-course.....and right into Metus' escape pod, which had just activated his warp drive. The escape pod was torn apart, and so was Metus."
- "[Stronius] tried to attack D-Klak, but was stopped dead in his tracks and thrown into Metus' escape pod by Ynot."