Enter the Unknown (Rivals of Ixalan)
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Target creature you control explores. (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 the creature, then put the card back or put it into your graveyard.) You may play an additional land this turn.
|M:tG Set||Rivals of Ixalan|
|Converted Mana Cost||1|