Here it is, the benevolent creator god of the Transformers, and the largest Autobot toy of the Cybertron line, and the eponymous planet Cybertron himself: Primus. Primus mythology was built in layers over time, with the original Marvel comics (and scribe Simon Furman) doing the heaviest lifting coming out of the 1986 Transformers animated movie. That film introduced us to Unicron, who had scant mythology but demanded it because of his outsized presence in the franchise. Furman took to building out Unicron as a cosmic god of chaos, a fundamental force in the universe that had become entombed into a metallic world, turning into a massive Transformer over the eons. To balance out that myth, he also created Primus, a force of order and creation, and counterpart to Unicron's destructiveness. Primus too became locked into a metallic world that he reformed over time to become Cybertron, and imbued the planet with life that would become the Transformers.
The toy version turns into a large mechanical planet, scaled to interact with the Armada-release of Unicron. Primus was available in 2006, capping off the Cybertron toy series with an impressive release.
