Ironman (Tony Starks) was severly injured in a war. He built the armored suit
which allows him to walk, fly, and shoot rays. He joined the Avengers to fight crime
and other forces of evil.
Origin: Marvel Super Heroes
Ironman defeats Thanos and saves the Avengers.
He use the gems to heal himself before abandoning them.
He feels bad for using them, but Captain America says it's okay.