Name:Portcullis
ManaCost:4
Types:Artifact
T:Mode$ ChangesZone | ValidCard$ Creature | Origin$ Any | Destination$ Battlefield | Execute$ TrigExile | TriggerZones$ Battlefield | TriggerDescription$ Whenever a creature enters the battlefield, if there are two or more other creatures on the battlefield, exile that creature.
T:Mode$ ChangesZone | ValidCard$ Card.Self | Origin$ Battlefield | Destination$ Any | Execute$ TrigReturn | TriggerController$ TriggeredCardController | TriggerDescription$ Return that card to the battlefield under its owner's control when CARDNAME leaves the battlefield.
SVar:TrigExile:AB$ChangeZone | Cost$ 0 | ConditionPresent$ Creature | ConditionCompare$ GE3 | Defined$ TriggeredCard | RememberChanged$ True | Origin$ Battlefield | Destination$ Exile
SVar:TrigReturn:AB$ChangeZoneAll | Cost$ 0 | ChangeType$ Card.IsRemembered | Origin$ Exile | Destination$ Battlefield | SubAbility$ DBCleanup
SVar:DBCleanup:DB$Cleanup | ClearRemembered$ True
SVar:RemRandomDeck:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/portcullis.jpg
Oracle:Whenever a creature enters the battlefield, if there are two or more other creatures on the battlefield, exile that creature. Return that card to the battlefield under its owner's control when Portcullis leaves the battlefield.