Optimus Prime was transported to Cybertron, Ultra Magnus and the Wreckers nearly killed him due to deliberate Decepticon misinformation that claimed he was a masquerading Decepticon agent which was disproved by Emirate Xaaron. Prime and Magnus then fought side-by-side on Cybertron for a period, until Ratbat cleverly deployed the Spacebridge to displace Magnus, Prime, and an insane Megatron to Earth. As Magnus adjusted to his temporary new home, he stumbled across Galvatron, who had returned from the future with a new scheme to harness the power of the Earth's core. Continuing their deeply bitter feud, Galvatron battled Ultra Magnus with help from the future Autobots, but in the end, the two leaders were entombed in volcanic lava. Galvatron was eventually able to effect his own release, and the Sparkler Mini-Bots (also known as the Sparkabots) extricated Ultra Magnus, who, by this stage, having suffered repeated defeats at Galvatron's hands, had developed a paralyzing fear of confronting the Decepticon. Galvatron, to his own amusement, set about pulverizing the Sparklers, with the intention of further tormenting the temporarily quiescent Ultra Magnus. With his comrades' lives at risk, Magnus overcame his demons to defeat Galvatron. The present-day Ultra Magnus would not have to face Galvatron again, but more terrifying threats were in store when he and the Sparklers returned to Cybertron and discovered that the city of Kalis had been overridden by hordes of zombie Transformers, reactivated by the renegade Autobot mad scientist, Flame. Ultra Magnus joined forces with the Wreckers and their allies to defeat Flame's plan to fire Cybertron's subterranean planetary engines and complete Megatron's ancient plan to turn the world into a huge battleship. Soon after, Magnus found himself involved in a grotesque illegal Gladiatorial game, and although he defeated his monstrous opponent and delivered a stirring speech to the crowd decrying their spectation of such a sport, his words failed to get through. Although that was the last appearance of the present-day Ultra Magnus, the future version of Ultra Magnus (from the same era as Rodimus Prime) made further appearances. He was present when Rodimus Prime, Kup, and Blurr went back in time to confront Galvatron and Death's Head, stating his doubts about the mission, teamed up with Soundwave's Decepticons to defeat the Quintessons, and was part of Rodimus Prime's team in the Time Wars. He did not get his final confrontation with Galvatron, however, as Galvatron used Decepticon