Complex sentence: The Watcher transported them away from his machines, and when the Hulk won he transported Qnax back to his homeworld and took the Hulk back to his base, where the Hulk took the Machine, despite the Watcher's warnings.
Split into simpler sentences: The Watcher transported them away from his machines to battle, and when the Hulk won, he transported Qnax back to his homeworld. He then took the Hulk back to his base, where the Hulk took the Machine despite the Watcher's warnings.