She can, but it's probably not a great idea
The flow is actually remarkably similar to the mainline Pokmon games: you can choose from a Bulbasaur, Charmander or Squirtle deck at the beginning, and your overall goal is to win the 8 medals from different Gyms, or Clubs as they're known here, so that you can go on to inherit the Legendary Cards
This five-color three-drop mono-White 2/2 can search out legendary stuff with a cost less than her power, and then her size rises with the number of other legendary stuff you control
When your Spell Queller has hexproof, targeted removal simply wont work to give the opponent their spell back
Ultra Pro Deck Protector Sleeves MTG Final Fantasy Commander Terra, Herald of Hope
And I could only imagine the QC issues for an independent minor league franchises team-issued cards