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
You have to choose a nonland permanent, which means thats on the board somewhere - you cant just name any card in MTGs history like with Pithing Needle or Sorcerous Spyglass, though those dont stop mana abilities, which Scheming Fence does
Theres plenty of value here, especially with that cheap spell-copy ability, but Id rather put that ability to use in the 99 of a commander like Niv-Mizzet, Parun or Narset, Enlightened Exile
Credit: Wizards of the Coast Arena of Glory Marcy: The only way this could be more red is if it hurt you and your opponent somehow
Storm This is not a deck I have successfully drafted myself, but its one that I have seen be very effective
Graveyard hate demolishes self-mill decks all the time