Name:Dromar's Cavern
ManaCost:no cost
Types:Land Lair
A:AB$ Mana | Cost$ T | Produced$ W | SpellDescription$ Add {W} to your mana pool.
A:AB$ Mana | Cost$ T | Produced$ U | SpellDescription$ Add {U} to your mana pool.
A:AB$ Mana | Cost$ T | Produced$ B | SpellDescription$ Add {B} to your mana pool.
T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigSacUnless | TriggerDescription$ When CARDNAME enters the battlefield, sacrifice it unless you return a non-Lair land you control to its owner's hand.
SVar:TrigSacUnless:DB$ Sacrifice | Defined$ Self | UnlessCost$ Return<1/Land.nonLair/non-Lair land> | UnlessPayer$ You
SVar:NeedsToPlay:Land.nonLair+YouCtrl
SVar:Picture:http://www.wizards.com/global/images/magic/general/dromars_cavern.jpg
Oracle:When Dromar's Cavern enters the battlefield, sacrifice it unless you return a non-Lair land you control to its owner's hand.\n{T}: Add {W}, {U}, or {B} to your mana pool.