Years ago when the Avengers first started, Iron Man found a strand of hair that had fallen off of Thor’s head. Tony kept the hair sample in case he might need it for later use.

When the New Warriors attempted to gain ratings for their reality show by capturing a group of escaped villains, Nitro used his explosive powers which killed most of the New Warriors and children at a near-by school. The government then proposed the Superhuman Registration Act to have all people with super-human powers register with the government. When the Superhuman Registration Act became law, Tony knew that they would need some serious strength on their side and the time had come to use the strand of hair. Along with Henry Pym and Mister Fantastic, Tony used the hair to create a clone of Thor.

The Pro-Registration side eventually set a trap for the Anti-Registration group, who were now known as the Secret Avengers. When the Secret Avengers attempt to escape, the Thor clone used his mechanical hammer to blast a hole through Goliath’s chest, killing him instantly. The Thor clone continued his assault until the Invisible Woman used her powers to protect the Secret Avengers and allow them to escape. The Thor clone was immediately shut down and taken back to base. Once they returned, Reed Richards began to examine what could have gone wrong with the clone.

Later, when Captain America surrendered to authorities, and the Superhuman Civil War had ended, Hercules destroyed the Thor clone, seeing to it that this clone could commit no further atrocities.