They quickly realize that Tony, Steve and Bruce are not returning to their original forms. Thor tries to use his magic hammer to reverse the petrification, but it doesn't work. Natasha suggests they take the statues to the Avengers' lab to see if they can find a solution.
After several hours of experimentation, they discover that Medusa used a special type of venom that has permanently turned the heroes into stone. However, Tony's genius mind was still active, and he had left a message for them within his own mind.
Using his own artificial intelligence system, the Avengers were able to communicate with Tony. He tells them that he remembers in one of his many scientific researches, he encountered a similar element that was capable of reversing petrification. It was a rare element named Nidavellir.
Determined to save their friends, the Avengers embark on a dangerous mission to retrieve Nidavellir. With the help of Rocket, Groot, and the Guardians of the Galaxy, they successfully acquire it. The Avengers then create an antidote that reversed the petrification, leading Tony, Steve and Bruce to come back to life.
Together, they all return to their headquarters, where hundreds of their fans await them. They have successfully saved the day, as always.
