Ultra Magus, Sentinel Prime and others in “The Elite Guard”

It definitely appears to be a fragment of the AllSpark. Apparently, your story about dispersing it may not be so far-fetched after all."

"But sir, you can't honestly believe that. He's a lying, insubordinate crankshaft."

"He may be a little rough around the edges, but in the heat of battle, Optimus Prime exhibited the qualities of a true leader: strategic thinking, determination, and above all, loyalty. Something you could stand to learn a thing or two about, Sentinel Prime."