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.
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 . The episode picks up with Earth in peril
Despite his overwhelming power, Vegito Blue's massive energy consumption causes the fusion to fail early, leaving Goku and Vegeta vulnerable. Channelling the hopes and energy of the remaining
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
Witness the intense showdown as Vegito Blue battles Merged Zamasu in this high-definition clip:
, 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
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