The Transformers #12

In "Man of Iron, Part 4," the sudden emergence of the enigmatic Man of Iron throws the human and Autobot forces into chaos as he attacks the excavation site. With Starscream arriving to eliminate the intruder, the Decepticons launch a full assault, forcing Jazz, Mirage, Trailbreaker, and Bluestreak to defend the site while Optimus Prime makes a fateful decision that will have lasting consequences—unaware that the buried craft holds a long-dormant Autobot whose fate is sealed in the blast.