Goku returns to Kame-Sennin to learn the Mafū-ba technique; Vegeta trains in the Room of Spirit and Time. Kaiō-shin and Gowas travel to Trunks' timeline where Gowas is severely injured while trying to reason with Goku Black. Vegeta fights Goku Black in SSG, briefly shifting to SSB. Goku attempts the Mafū-ba on Zamas but forgets the talisman. Goku Black and Zamas fuse (Potara) into God Zamas (immortal). Goku and Vegeta use the Potara to fuse into Vegerot, but the fusion only lasts for an hour (as they are mortal) and breaks apart early. Trunks, who has healing powers as an apprentice of Kaiō-shin, heals Goku.