When Drowned Caldera enters the battlefield, return a land you control to its owner's hand.
: Add to your mana pool. Return Drowned Caldera to its owner's hand.
, : Target player reveals the top card of his or her library.
: Add 
to your mana pool. Return Drowned Caldera to its owner's hand.
, : Target player reveals the top card of his or her library.
