After the events of the Battle of Roxtus, Tuma and Stronius were out scouting for a place for a new fortress when they stumbled onto a Baterra Laboratory. During the fight, they both fell into a pool of Energized Protodermis. They emerged as Tomium, and quickly destroyed the rest of the Baterra.
- His name is a mix of Stronius and Tuma.
- He is Baterra1202's tallest MOC.