Name:Cavern Harpy ManaCost:U B Types:Creature Harpy Beast PT:2/1 K:Flying T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Creature.Self | Execute$ TrigChange | TriggerDescription$ When CARDNAME enters the battlefield, return a blue or black creature you control to its owner's hand. A:AB$ ChangeZone | Cost$ PayLife<1> | Origin$ Battlefield | Destination$ Hand | SpellDescription$ Return CARDNAME to its owner's hand. SVar:TrigChange:DB$ ChangeZone | Origin$ Battlefield | Destination$ Hand | Hidden$ True | Mandatory$ True | ChangeType$ Creature.Black+YouCtrl,Creature.Blue+YouCtrl | AILogic$ NeverBounceItself SVar:NeedsToPlay:Creature.Black+YouCtrl+cmcLE2+inZoneBattlefield,Creature.Blue+YouCtrl+cmcLE2+inZoneBattlefield SVar:Picture:http://www.wizards.com/global/images/magic/general/cavern_harpy.jpg Oracle:Flying\nWhen Cavern Harpy enters the battlefield, return a blue or black creature you control to its owner's hand.\nPay 1 life: Return Cavern Harpy to its owner's hand.