I'm trying to come up with a power to give my new story's hero. It needs to be something incredibly dangerous and destructive, something that he can do good things with but still carries the inherent risk of causing incredible destruction if used carelessly. Preferably something colorful and flashy so that the public (who aren't aware of the threat he poses) can idolize him kind of like Superman. The best idea I have now is that he can split atoms, causing nuclear explosions. He can control how big the explosions are, but if his concentration lapses even once he could reduce an entire city to ashes. What do you guys think?