Ruination is the combined form of the Commandos, the Decepticons' military squad. While the minds and bodies of all five Commandos come together to make him, Armorhide, Movor, Rollbar and Ro-Tor cede all control to their leader Mega-Octane to make Ruination a more coordinated, intelligent and deadly warrior, whose only interest is in fighting. Ruination is so fierce that even Megatron is wary around him. (tfwiki)
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