Thanks to flash, Angel of Grace does a pretty good job of dodging sorcery-speed removal like Ravenous Chupacabra, Vivien Reid, and Vraska, Relic Seeker
You won't always need a payoff for your lifegain in cube for it to win the game
Given that Yamatos decision to identify as male was based on his desire to emulate the legendary Samurai Kozuki Oden, its fitting that this card can also be treated as a Character card with the name Kozuki Oden (or, as spelled on the card and in certain translations, Kouzuki Oden)
Surgeon General Commander I fall on the side of many who believe that Surgeon General Commander is meant to be some kind of plant by featuring the mutate keyword with no other context
He's now a Synchro Monster that can be used with Time Wizard, and has two extraordinarily powerful effects as well as a colossal ATK value