Sorcerer Supreme Tony Stark from Another Universe

"Besides the Infinity Stones, there was energy. Logically speaking, the Infinity Stones possessed infinite energy, but they only worked within their own universe. Other than that, energy basically had to be obtained through technology. The most typical example was Iron Man Tony Stark's Arc Reactor. There should be others as well. Those aliens could power such enormous space battleships, so their achievements in energy technology certainly wouldn't be lacking.