https://dragonball.fandom.com/wiki/Watagash
He can possess people and give them a power boost, based on how evil they are. When possessing Barry Kahn, he was so strong that Gohan needed SSJ to beat him. Barry was a jerk, blackmailer, and liar, but he wasn't a torturer or murderer or anything. What if Watagash had possessed someone like Freeza or Moro?
Just for fun: If we assume that Barry had a normal human power level of 5 like the farmer, and Watagash's boost got him to 150,000,000 (same as SSJ1 Goku on Namek... probably a low end since Gohan was much stronger than Goku at this point), then that's a boost of 30 million times. Also, if we assume that Freeza or Moro are 10 times as evil as Barry, that's a boost of 300 million times.
I know these numbers don't really make sense as power levels aren't all that consistent and you also can't really quantify something like 'evil', but just humor me for a bit. Can you imagine a Golden Freeza or Moro that is 300 million times stronger?
Nothing short of Zeno or a wish from Super Shenron would be able to stop them.
