At the dawn of time, Primus created the Thirteen original Transformers to crew his planetary form into battle against his eternal nemesis Unicron. One of the Thirteen, Megatronus Prime, turned against his siblings and his creator and betrayed them all. Now he is a being of power, darkness, and absolute dedication to Unicron. At the end of the first battle between the two beings, for his treachery, The Fallen was sealed into extradimensional limbo along with Unicron. Note: The Fallen, Vector Prime, and the other first 13 Transformers are singular entities across the multiverse.