Overall, I really like this idea and design
If you beat him, you get Promo cards, but you only have one chance each time
G/R Monsters : A ramp deck with Domri Rade
You can either pair two creatures with the generic partner keyword (the most infamous, top tier of commanders is the pair: Thrasios, Triton Hero and Tymna the Weaver) or you can use creatures that have specific partners with abilities, like Haldan, Avid Arcanist and Pako, Arcane Retriever or Amy Pond and The Eleventh Doctor or Rory Williams
Still, a four-mana token generator isn't bad, and if left unchecked, Garruk can definitely become a game-ending problem for your enemies
They use cards that discard the opponent's Energy, limit their hand size, or shut off their Pokmon's Abilities