That gives you a 4/4 creature for four mana that draws you a card when you play it, not too bad at all
2x Dragonite 2x Dragonair 2x Dratini 2x Lapras ex (can swap for more free-to-play friendly cards) 2x Fossil Card 2x Poke Ball 2x Professors Research 2x Sabrina 2x X Speed 2x Potion If you don't have Water-type ex Pokemon such as Starmie ex, Lapras ex, or Articuno ex, then try Dragonite alongside Electric-type Pokemon such as Pikachu ex, Zapdos ex, and easier to attain Pokemon such as Electrode or Pincurchin
Court of Grace makes me the monarch and will give me an upkeep trigger that will create either a Spirit or Angel
Building a deck around the Baron is going to require careful consideration: when I build Commander decks, I usually make piles by converted mana cost and make decisions on what to play and what not to play based on having a good mana curve
and some big impact spells like Dig Through Time, Brasss Bounty, and Sublime Epiphany