Name:Thran Quarry
ManaCost:no cost
Types:Land
A:AB$ Mana | Cost$ T | Produced$ Any | SpellDescription$ Add one mana of any color to your mana pool.
T:Mode$ Phase | Phase$ End of Turn | TriggerZones$ Battlefield | IsPresent$ Creature.YouCtrl | PresentCompare$ EQ0 | Execute$ TrigSac | TriggerDescription$ At the beginning of the end step, if you control no creatures, sacrifice CARDNAME.
SVar:TrigSac:AB$Sacrifice | Cost$ 0 | Defined$ Self
SVar:NeedsToPlay:Creature.YouCtrl
SVar:Picture:http://www.wizards.com/global/images/magic/general/thran_quarry.jpg
Oracle:At the beginning of the end step, if you control no creatures, sacrifice Thran Quarry.\n{T}: Add one mana of any color to your mana pool.