Dragon Ball Super Manga Chapter 21 review is here as Goku and Vegeta retreat to the past and Goku Black and Zamasu KILL EVERYONE! Goku learns the Mafuba, Vegeta trains once again, Trunks vs Goku Black continues as Gowasu and Supreme Kai arrive in the future but a SHOCKING EVENT HAPPENS: Goku Black KILLS GOWASU! Quite the shocker plus more time travel nonsense. Check out the breakdown of this month's Toyotaro Dragon Ball Super Manga.