So Stane builds a suit based on Stark's first suit, the Mark I, which Raza found in the desert and gave to him. He names his suit the Iron Monger. But his scientists cannot make an arc reactor to power it, so he goes to Stark's house to steal his. He paralyses Stark with a small device that Stark built, and takes the arc reactor out of his chest. Without the arc reactor, Stark cannot live long. He goes back to his workshop to find the original arc reactor. He breaks the glass box and puts the old arc reactor in his chest. Then he puts on the Mark III suit to fight Stane.