The Matrix of Leadership now resides within him.
Half of it, at least. It reached him abruptly. One moment, Hot Rod was focused on the task at hand: beat Deception afts, secure the energon supply the ship sensors had picked up on while orbiting a planet that seemingly lacked sentient life; then a blinding light, something crashing straight into him, a ringing in his audials. Then, nothing.
When Rodimus Prime woke up, he was back on the ship. Kup hovered over him, concern twisting the old mech's face into something ugly. He warned Hot Rod Rodimus to take it easy, to give himself time to 'get used to the change' and, of course, Rodimus didn't listen. That simple sentence freaked him out enough to make him overcome the dizziness, make his way to a mirror.
The face that stared back at him was... new. Unfamiliar yet, something deep inside told him it was his— that it would be his from now on.
It took him a few days to truly get used to the feeling. The changes. Upgrades upon upgrades that were not just cosmetic, but also internal: software that hadn't been there before, and more upgrades. Kup told him that is how the Matrix works in the stories: choosing a mech to become its host, changing them inside and out to be more befitting of it. Rodimus was pretty sure that Kup was as old as those stories —if not as old as the half-matrix currently inside Rodimus—, so he was inclined to believe him.
As it turned out, not even the legendary matrix of leadership could stop Rodimus from making sudden decisions.
Especially not after one night, while Rodimus lied in his berth, finally achieving sleep after a day of dealing with overextended joints, it decided to plague his dreams with memories that weren't his own: a planet he hadn't ever seen, a great battle against the one they call Megatron, autobots– Arcee.
How long had it been since Arcee and Cliffjumper left? Rodimus had thought them lost forever. The last he'd heard from her, she reported that they'd received a signal from some far away planet and they were going to answer it. Then, nothing. A lot of nothing for cycles. But there she was, as alive as the last time he'd seen her.
The smaller vessels couldn't travel as fast as the main ship, but Rodimus made due. He said his goodbyes, left Kup in charge, didn't listen to anyone's protests, and set out on his own. Determined to find his friends. Half tracking their last known position, half following this broken relic inside him that pulled him forward, towards the unknown, like a magnet.
Nearly three months after one half of the matrix of leadership simply disappeared, agent Fowler walked into the Omega One Outpost. "We had a deal, Prime!" he called out. "You were supposed to inform me of any newcomers! Tell me WHY I just received a call from the Appalachians about an unidentified flying object that came apart upon entering the atmosphere, crashed somewhere, and left THIS behind."
He opened the folder he was holding, revealing images of a large chunk of metal with what looked like half the autobot sigil still intact.
"You better get a move on and make sure whoever came down with the ship doesn't end up on the news!"