Name:Bog Serpent
ManaCost:5 B
Types:Creature Serpent
PT:5/5
S:Mode$ CantAttack | ValidCard$ Card.Self | UnlessDefenderControls$ Swamp | Description$ CARDNAME can't attack unless defending player controls a Swamp.
T:Mode$ Always | TriggerZones$ Battlefield | IsPresent$ Swamp.YouCtrl | PresentCompare$ EQ0 | Execute$ TrigSac | TriggerDescription$ When you control no Swamps, sacrifice CARDNAME.
SVar:TrigSac:AB$Sacrifice | Cost$ 0 | Defined$ Self
SVar:NeedsToPlay:Swamp.YouCtrl
SVar:Picture:http://www.wizards.com/global/images/magic/general/bog_serpent.jpg
Oracle:Bog Serpent can't attack unless defending player controls a Swamp.\nWhen you control no Swamps, sacrifice Bog Serpent.