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Dragon Ball Super Episode 66
The Climactic Battle! The Miraculous Power of A Relentless Warrior!
Goku puts all of his power into his Kamehameha, which is able to pierce through Fusion Zamasu’s attack and stop him from destroying Earth. In the wake of the explosion, Goku is exhausted, and Fusion Zamasu is injured. When Fusion Zamasu grabs him, Goku overpowers him using his Kaio-ken technique, and knocks Fusion Zamasu back temporarily. However, Goku’s use of the Kaio-ken drains all of his energy, and he collapses. Fusion Zamasu regains consciousness and powers up, but he still does not heal properly. Vegeta wonders why Fusion Zamasu is not healing. Gowasu explains that Fusion Zamasu must be mortal since Goku Black was as well. Goku decides that the only way they can win is for him and Vegeta to fuse using Kaiōshin-sama’s Potarra Earrings. Vegeta initially refuses until Gowasu explains that a Potarra fusion that does not involve a Kai only lasts for one hour. Goku and Vegeta fuse to become Vegito. Vegito powers up to Super Saiyan Blue and begins fighting Fusion Zamasu. Vegito quickly gains the advantage, but Fusion Zamasu grows even stronger. Gowasu explains that Zamasu’s mutation is a result of his anger manifesting in physical form. Meanwhile, Bulma and Mai finish repairing the Time Machine. Mai gives Future Trunks his broken sword, which inspires him to keep fighting. Future Trunks uses his power to restore the sword. Vegito and Fusion Zamasu continue fighting. Vegito is winning until his fusion abruptly breaks. Fusion Zamasu begins to pummel Goku and Vegeta until Future Trunks arrives to help. Future Trunks unknowingly begins gathering energy from all living things on Earth. With this new power, Future Trunks runs his sword through Fusion Zamasu and cuts him in half.