Calciform Caldera
Artifact Land (Rare)

(Calciform Caldera isn't a spell.)

When Calciform Caldera enters the battlefield, return a land you control to its owner's hand.

Calciform Caldera is indestructible. (Destroy effects and lethal damage don't destroy it.)

RW, Tap: Put a Mountain or Plains card from your hand onto the battlefield tapped.

Jesper Grant West