There have been multiple examples of this in the last two weeks alone
They're especially useful for getting your haste enablers online early, but a simple Birds of Paradise basically pays for itself if it also has haste
Anytime you cast a spell that would trigger a prowess effect, Bria will make one of your creatures unblockable for the turn, letting you sneak in commander damage or even just regular damage through enemy lines
This makes him relatively less reliable and consistent than the other decks on this list that can dish out a lot of damage with mere basic Pokemon
List cards at or near the Market Price, use accurate condition grades (Near Mint, Lightly Played, etc.), and respond to buyer messages quickly
The end result is that the contents of most decks event preconstructed ones are inversely proportional to rarity, with lots of rare-heavy decks and few lower rarities to speak of