How does the Matrix feature in the comic?
It’s first mentioned in #5, and initially takes the form of a computer program stored in Optimus Prime’s head. It can create Transformers, giving life to the Constructions, Jetfire, the Aerialbots, the Stunticons and presumably the Protectobots and Combaticons, before being sent into space with Optimus Prime’s body in #28. However, it would seem at some point [note that it’s not explicitly mentioned] it was transferred to a removable device, which is first mentioned in #62, featuring heavily in the ‘Matrix Quest’ arc that began in that issue and ended in #66, and looks like the same as in the Movie and cartoon. Like the Movie, it is the only thing that can destroy Unicron.