Ornery Tumblewagg (Creature) Saddle, one of the new mechanics in Outlaws of Thunder Junction, lets you tap your other creatures to activate a special effect a lot like Crew from Kaladesh
In my experience, only the most high-roll pools where you get tons of removal and bombs in-color can reliably take the slow path
The Prismatic Piper Anyone telling you this card is good for sideboarding in against Cast Down decks is just memeing on you
This deck uses its leader effect to add 2 cards to its life total when it has no cards in its hand, making it a strong contender in the mid-game
Your opponent that had that turn one fast start with their enabler or payoff or combo in plain sight on top of their deck can change how your table approaches the game, and Field of Dreams might assist in making sure the tables threat assessment or removal is pointed in the right direction
Youd expect an effect like that for one mana, so its not off to a great start