Unicron

Unicron is a colossal, planet-consuming entity of cosmic scale whose hunger threatens all of Cybertron. One of the Transformers universe's most devastating threats, he dwarfs both Autobots and Decepticons in sheer destructive magnitude, forcing bitter enemies to confront a common doom.

Few villains in the Transformers mythos loom as large as Unicron, the planet-devouring colossus who first thundered onto the page in The Transformers #61 in 1989, conjured by the legendary creative partnership of Simon Furman and Geoff Senior. Emerging at the tail end of Marvel's Copper Age run, this cosmic-scale threat shares his pages with titans like Optimus Prime, Galvatron, and Starscream — company that tells you everything about the magnitude of the stage he commands. His presence stretches across decades of publishing, from that original Marvel run through Transformers: Regeneration One and beyond, cementing him as one of the most enduring and terrifying figures in the franchise's long history. If you're building out your Transformers collection, tracking down Unicron's appearances is chasing the darkest, grandest corner of a universe that never stops expanding.