Calciform Valley
Artifact Land (Rare)

(Calciform Valley isn't a spell.)

Calciform Valley enters the battlefield tapped unless you control four or more colorless permanents.

1, Tap: Look at target player's hand.

Tap: Add G or W to your mana pool.

Put Calciform Valley on top of your library: Add 1 to your mana pool.

Ron Briclot