Unicron

===Background===
[[File:OneShallRise1-Unicronsilhouette.jpg|220px|thumb|Unicron at the dawn of time]]
As the Universe began to form, the only living things (at least in their part of space) were two brothers Primus and Unicron on the uninhabited planet [[Cybertron]]. The two battled for the fate of the universe with neither gaining advantage. According to Optimus the tide was turned more times than it could be counted. To turn the tide firmly in his favor Primus created the [[Thirteen]] to fight with him. With these additional warriors Unicron was finally defeated and cast out in to deep space. 

As he drifted and in slumber, space debris began gathering around him due to his gravity field. Eventually he was caught in the third orbit of a sun and became the very core of planet [[Earth]] in the Milky Way galaxy. Though Unicron's time adrift in space he bled Dark Energon which itself went adrift. The Covenant of Primus unveils a prophecy that foretold Unicron's awakening on Earth, though the details failed to mention that it was actually referring to Unicron and Earth. On Cybertron, stories were told of Unicron's defeat and he became a feared figure. But over time, as society marched forward, the Cybertronian people dismissed the Chaos Bringer as nothing more than a legend. 

At some point the Cybertronians found some Dark Energon and experimented with it in a space station commanded by [[Starscream]]. Eventually when the Great War came about [[Megatron]] used this very substance to poison Cybertron's core which lead to the planet's shutdown and the Great Exodus.

During the war on Earth Unicron was mentioned when Dark Energon was in play and was often referred to as the "Blood of Unicron." Unicron's Dark Energon was used to create an Terrorcon army of fallen Autobots and Decepticons to invade Earth, was later used to revive Megatron's damaged body and create a Terrorcon [[Skyquake]].