The angrier he gets, the stronger he gets—and Bruce Banner's gamma-irradiated alter ego has gotten angry enough to crack continents and punch through dimensions. The Hulk's strength has literally no known upper limit, he regenerates from virtually any wound, and his thunderclap can level city blocks. The only thing scarier than fighting the Hulk is the realization that he hasn't even started trying yet.

The Norse god of thunder, son of Odin, and wielder of the legendary hammer Mjolnir—a weapon so heavy that no other being in the Nine Realms can lift it. Thor commands the storms themselves, and a single blow from Mjolnir can level mountains and split the World Serpent's skull. He once drank so much of the ocean that he created tides, just to lose a bar bet.