The Protodeka was a gigantic repulsorlift weapons platform with rapid-firing heavy turbolasers and deadly seeker missile launchers with rapid-fire ability. Designed by a Colicoid scientist, it also had a seismic wave emitter that destroyed anything within 10 meters.
The Protodeka saw action on Raxus Prime and Thule, where they defended both Count Dooku and the ancient Sith city of Kessiak, which contained the Dark Reaper. They were destroyed by Obi-Wan Kenobi on Raxus Prime, and Mace Windu and Luminara Unduli on Thule, where each of the victors utilized the TX-130 Saber-class fighter tanks to win their respective battles against the droid tank.
Designed to turn the tide in favor of the Confederacy, the Protodeka turned out to be too expensive to mass-produce, so only a few were built. Following the end of the Dark Reaper campaign, the Colicoid engineer who designed the Protodeka was imprisoned within the Fortress of Axion.