, titled "Showdown! The Miraculous Power of Unyielding Warriors" (or "Decisive Battle!"), is widely regarded as one of the most high-stakes and visually impressive episodes in the series. It first aired in Japan on November 13, 2016 , and serves as the penultimate climax of the Future Trunks Arc. Plot Summary
Future Trunks takes the final stand. Channelling the hopes and energy of the remaining survivors into a "Spirit Bomb-like" energy, he empowers his broken blade and slices Merged Zamasu in half . Dragon Ball Super Episode 66
The episode introduced a major piece of lore: Potara fusion is only permanent for Supreme Kais . For mortals, the fusion has a one-hour time limit . , titled "Showdown
Realizing that Zamasu's mortal half (Goku Black) is preventing his immortal half from healing properly, Goku and Vegeta decide to use the for a final gambit. They fuse into Vegito , who immediately transforms into Super Saiyan Blue to engage in a high-speed battle with the mutated Zamasu. Key Events & Revelations Plot Summary Future Trunks takes the final stand
The episode picks up with Earth in peril as prepares a world-ending attack. Goku counters with a full-power God Kamehameha , successfully piercing Zamasu's energy ball and causing half of Zamasu's body to become purple and distorted.
