Transformers: The Headmasters bot Headmasters, led by Cerebros return to their home planet to aid in its defense. The situation soon gets worse when it is revealed that Vector Sigma, the super-computer at the planet's heart, was destabilizing, and Optimus Prime again sacrifices his life to save Cybertron. This soon proves to be only delaying the inevitable, however, when a bomb attack instigated by Scorponok turns Cybertron into a burnt-out, inhospitable husk. Rodimus Prime departs to search for a new planet for the Transformers to live on, leaving Cerebros in command, operating from the planet Athenia. Meanwhile, Scorponok replaces Galvatron - who had
Transformers: The Covenant of Primus on Earth during the time of the Beast Wars, where Unicron's displaced life force had landed after the destruction of his body. After losing several of their number, they realized that the key to defeating Unicron was to utilize their lifeforce, which was produced by Primus himself. Together with an army of Transformers of all factions from across time and space, they succeeded in defeating Shokaract, allowing Unicron's lifeforce to be drawn back into the time vortex from which it had emerged. Transformers: The Covenant of Primus Transformers: The Covenant of Primus is a companion novel to the so-called Aligned