This concept began with the release of a series of "Transformers: Armada" trading cards by Fleer. The biography printed on Unicron's card presents him as one of two heralds created by the Allspark to explore the newly birthed universe. Inspired by his Marvel Comics origin, the other herald is Primus, and the brothers set about this task until they come upon a region of space teeming with pure Energon. Unicron wants the power for himself and cuts Primus down before he can report it to the Allspark, casting his brother's body into the orbit of a nearby star. Unicron goes on to become the engine of destruction that menaces the universe.