Explore the Unseen

Choose a basic land type. If you control no lands with the chosen type, search your library for a basic land card with that type and put it onto the battlefield tapped. Then shuffle your library.
Cycling {4} ({4}, Discard this card: Draw a card.)
When you cycle Explore the Unseen, you may create a colorless Treasure artifact token with
"{t}, Sacrifice this artifact: Add one mana of any color."