pokemon cards mewtwo v union CGC 10 PRISTINE Japanese 2021 V-UNION 007/013 V-UNION SP5 Pokémon V Pokemon Card Japanese - Mewtwo

That would be because of mana burn

In the case of Charizard, only one out of the five in Brilliant Stars is a Secret card, and even then, it doesn't quite manage to earn the title of most valuable

Even though this does not have a Border, my assumption is this came from the SV Era because the text formatting matches the DECK 01

The copy of Pyromancy 101 created by the granted activated ability can't be taught after it resolves

Which decks combined two themes most awesomely

Additionally, the fact that the tokens he creates immediately involve themselves in combat puts Brimaz on another level as far as token creation cards are concerned