Genius, billionaire, playboy, philanthropist
Chapter 1
"And… I… am…. Iron Man.", he said, victorious, as he snapped his fingers. The power that went through him was insane. Tony could feel his arm falling off. Without a sound, it just fell off. He thought that the pain was imagined. He was wrong. When he could see again, he saw Pepper, Rhodey and Peter near him as he was apparently dying. He was thinking of the idea that saved his life. Injecting Extremis into his organism. I am a genius, he thought. At least he was not leaving his family and friends right now. He injected himself with a shitload of Extremis, probably more than Killian himself. He knew that his arm would not regrow even if he were made of pure Extremis because of the sheer power of the snap. At least his fried ear would grow back to normal. He smiled as he fell unconscious to recover and heal as much as possible. No one knew of the Extremis in Tony's body yet and he wanted to change that as soon as possible.
Meanwhile…
Doctor Stephen Strange, Sorcerer Supreme, Master of the Mystic Arts and Master of Kamar-Taj had never foreseen this. He had clearly seen in his winning scenario that Tony Stark sacrificed himself for the universe. He did snap his fingers, yes. But he survived. He survived the full blow of all six Infinity Stones. That was impossible. Only Thanos and Hu- whoops, Professor Hulk have survived a snap- but barely. And Tony Stark was a normal human. And he lived. He definitely wanted to look further into this. He had no idea, no explanation and no reason as to how a mortal human with a metal nanotech armor survived the snap. Unbelievable. No.