Megazarak's rise to power set Cybertron on course for destruction. Unlike other Decepticon leaders before him, he has a thirst for destruction and chaos. His genocidal rampage began with the killing of his timeline's Optimus Prime and let the Autobot leader's chassis rusted on the Rust Sea's shores. (The Autobot leader's remains would be used by Unicron to clone his herald: Nemesis Prime.)