[C] Union Gain: Attach up to 2 [W] Energy cards from your discard pile to this Pokemon
Players will receive the same card set for each starter pack in every reroll
Goblin Tutors Goblin Matron, Goblin Recruiter, Moggcatcher Goblins have been a force to be reckoned with in Commander for over a decade, traditionally headed by cards like Krenko, Mob Boss to make dangerous swarms or Purphoros, God of the Forge to inflict massive damage to the table in and out of combat, but plenty of other color combinations and strategies are quite viable too
Even Amazon sells Pokmon booster boxes, but you will, of course, be limited to the whichever sets are currently in circulation
The first player is usually heavily advantaged in modern Magic, and designs like Lonely End and Sylvan Smite give the second player more stabilizing potential when playing from behind
While you will need to activate it every turn for this to work, once you have an established board state, that's not a big ask whatsoever