Cybertron

Cybertron is the homeworld of the Transformers and the original home of the Autobots and the Decepticons.

Eons ago, Primus and Unicron battled one another for the entire universe. Only be creating the 13 Original Primes was Primus able to defeat Unicorn and cast him into deep space. With that, Primus became the planet Cybertron, and according to legend,Primus still lives within the Core of Cybertron. Many centuries later, Civil War broke out between the Cybertronians. One side became the Decepticons who wish to conquer the universe, while the other became the Autobots who wish to explore and share their technology with others. The war dragged on for millions of years which ravaged much of Cybertron. The war take a turn for the worse with Megatron, the leader of the Decepticons infect Cybertron's very core with Dark Energon, the blood of Unicron, casing the planet to shut down in order to repair itself, which take millions of years to complete. Optimus Prime, the leader of the Autobots decide to leave Cybertron in order to the Transformers to survive, Primus gives Optimus The Matrix of Leadership, a part of Primus which carry the wisdom of the Primes in the past to take with the Autobots among the stars. Optimus and the Autobots build the Ark to leave Cybertron in search for a new home, while Megatron build Nemesis to conquer other worlds. Both launch into space and both eventually crashed on Earth. Cybertron remain a barren wasteland to this very day.

Trivia:

 * It is unknown if Jaden, Jeffery or Hiccup can visit Cybertron due to it being barren and scared by million of years of Civil War.