The higher the level the brothers are when you duel them, the more points you get, whether you win or lose
Exceptions here can include things like a tiny supply or being on the Reserve List
The first ever Charizard EX card arrived in the XY series' Flashfire set, which was effectively a set mainly based around Charizard
However, weirdly enough, its also sometimes the best card against soft graveyard hate like Relic of Progenitus and Soul-Guide Lantern, as you can quickly rebuild a graveyard to fuel a Murktide Regent if your opponent has exiled your graveyard earlier in the game
Punishing Damage: Whereas Incremental Damage is often triggered by your efforts, other forms hurt opponents whenever they make certain plays (Cemetery Gatekeeper, Harsh Mentor, Eidolon of the Great Revel, Zo-Zu the Punisher, Manabarbs), limiting their choices in what plays can be safely made as the game progresses
And if in doubt, the model will ask to clarify