Map

1, T, Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.)

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Plot

After you plot a card, you can place the exiled card here. You may cast it as a sorcery on a later turn without paying its mana cost.