The first counter allows Urzas Saga to tap for colourless mana, the second adds an ability you can pay two for to put a 0/0 Construct into play that gets +1/+1 for each artifact you control, and the final ability lets you search your library for an artifact with a mana cost of 0 or 1 and then put it straight into play
In Un- games, you can choose any applicable cards from outside the game, even if they're not part of your Draft or Sealed pool or part of your Constructed sideboard
With Choco, you get cards and lands from your library while you attack with birds, so Battle Screech becomes your friend
Its a little further from the limelight for Control and Midrange, but certainly possible
Notably, the new Rise of the Floodborn Enchanted cards include a few surprising choices, with characters like Lady Tremaine and Nemaari getting a spotlight alongside classic Disney characters like Alice, Cinderella, and Snow White
Its good to have a card like Traumatize tied to a land
