Name:Mercenary Knight
ManaCost:2 B
Types:Creature Human Mercenary Knight
PT:4/4
T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ DBSacSelf | TriggerDescription$ When CARDNAME enters the battlefield, sacrifice it unless you discard a creature card.
SVar:DBSacSelf:DB$ Sacrifice | Defined$ Self | UnlessCost$ Discard<1/Creature> | UnlessPayer$ You
SVar:NeedsToPlayVar:Y GE2
SVar:Y:Count$TypeInYourHand.Creature
SVar:Picture:http://gatherer.wizards.com/Handlers/Image.ashx?multiverseid=4228&type=card
Oracle:When Mercenary Knight enters the battlefield, sacrifice it unless you discard a creature card.