Without a doubt, Ultra Instinct is Goku’s most powerful form. He used it for the first time during the Tournament Of Power from the Dragon Ball Super anime. But despite being insanely powerful and surpassing even the gods’ strength, the Ultra Instinct used by Goku had a major drawback: it was burning out energy extremely fast (in only several minutes, literally).
While using Ultra Instinct, Goku could still teach some manners into Jiren and Kefla. While being pumped up with this technique, the mighty Saiyan even eliminated Kefla, the merger between the two female Super Saiyans Kale and Caulifa.
Beware of Chapter 63 from Dragon Ball Super Manga
During the Moro arc from the Dragon Ball Super Manga, Goku finally manages to master the Ultra Instinct technique. Being the strongest villain that Goku and Vegeta ever had to face, Moro is less lucky than Jiren, another fighter that gave Goku a tough fight. Goku lost all of his fuel fast while fighting Jiren in the Ultra Instinct form, but Moro receives special treatment.
Chapter 63 from the Dragon Ball Super Manga shows Goku as he’s finally able to control the Ultra Instinct form. And he does it in the good old Goku way: after being beaten down near death by Moro. Perhaps the Zenkai boost in power was the key to unlock the full power of Ultra Instinct once and for all. Saiyans become much stronger every time they are severely injured and recover afterward.
Thanks to Dende’s healing technique, Goku has been recovered after he was pierced right through his chest by Moro. Our hero has been through some intense training sessions with Merus, the angel who taught him how to fully control his Ultra Instinct technique. But the Saiyan may not have been able to do it even with the training, and it was needed for a Zenkai boost to get the job done. Goku proved against Moro that he can finally use Ultra Instinct anytime he wants.
We’re all eagerly looking forward to how the Moro arc will end. At this point, the villain seems unstoppable.