Ion Man was engineered by Hope Pym to become the ultimate assassin. His first mission was to kill Dr. Cassandra Lang. He attacked LangLabs only to be confronted by the visiting Mainframe. He easily used his powers to slice through Mainframe, only to have another Mainframe appear and attack him. He used his powers to lance off Mainframe's arms only to have another Mainframe attack. He kept destroying Mainframes until one was able to channel his energy matrix through itself and blast him into the ozone layer. His chest plate then fell to the ground, harmless.
Powers and Abilities
Ion Man was a form of living ions who was capable of firing energy blasts from any part of his form. As well, he was capable of flight and other energy forms and physical matter could pass through his body (with the exception of his chest plate and gloves).