A ruthless, heavily armed monstrosity summoned from Cybertron's past by Galvatron. His alternate mode is a gigantic aircraft carrier.

~In the Legends manga, it's revealed that he was built by [Zarak](https://anilist.co/character/318670/Black-Zarak) under the influence of Devil Z.!~

The film revolves around the Maximals, led by Lio Convoy; the Predacons, led by Galvatron; and a mysterious device that has crashed on Planet Gaia (a future version of Earth), leading to the arrival of a legendary Maximal warrior, and the protagonist of the original Beast Wars series, Beast Convoy (Optimus Primal). Galvatron also uses the device to summon a monster Decepticon called Majin Zarak, who threatens to destroy all the Maximals.<br><br>
(Source: Wikipedia, edited)