When Tony Stark was injected with Extremis, it was an act of desperation done to save his life. It was unknown what that untested nanotech virus would do to him. In the end, however, it expanded his mind, enhanced his abilities, and rebuilt his body into a living weapon. Granted full cybernetic interface with his armor and any nearby technology, he became truly invincible, and nearly unstoppable. Kids can position this density-shifting Marvel hero in their Super Hero and Super Villain figure collection to imagine a super battle for the ages! This figure features classic design and styling, so heroes-in-training can imagine scenes from the Marvel Universe happening right before their eyes!