Name:Baneblade Scoundrel
ManaCost:3 B
Types:Creature Human Rogue Werewolf
PT:4/3
T:Mode$ AttackerBlocked | ValidCard$ Card.Self | TriggerZones$ Battlefield | Execute$ TrigPump | TriggerDescription$ Whenever CARDNAME becomes blocked, each creature blocking it gets -1/-1 until end of turn.
SVar:TrigPump:DB$ PumpAll | ValidCards$ Creature.blockingSource+DefenderCtrl | NumAtt$ -1 | NumDef$ -1
K:Daybound
AlternateMode:DoubleFaced
Oracle:Whenever Baneblade Scoundrel becomes blocked, each creature blocking it gets -1/-1 until end of turn.\nDaybound (If a player casts no spells during their own turn, it becomes night next turn.)

ALTERNATE

Name:Baneclaw Marauder
ManaCost:no cost
Colors:black
Types:Creature Werewolf
PT:5/4
T:Mode$ AttackerBlocked | ValidCard$ Card.Self | TriggerZones$ Battlefield | Execute$ TrigPump | TriggerDescription$ Whenever CARDNAME becomes blocked, each creature blocking it gets -1/-1 until end of turn.
SVar:TrigPump:DB$ PumpAll | ValidCards$ Creature.blockingSource+DefenderCtrl | NumAtt$ -1 | NumDef$ -1
T:Mode$ ChangesZone | Origin$ Battlefield | Destination$ Graveyard | ValidCard$ Creature.blockingSource+DefenderCtrl | Execute$ TrigLoseLife | TriggerZones$ Battlefield | TriggerDescription$ Whenever a creature blocking CARDNAME dies, that creature's controller loses 1 life.
SVar:TrigLoseLife:DB$ LoseLife | Defined$ TriggeredCardController | LifeAmount$ 1
K:Nightbound
Oracle:Whenever Baneclaw Marauder becomes blocked, each creature blocking it gets -1/-1 until end of turn.\nWhenever a creature blocking Baneclaw Marauder dies, that creature's controller loses 1 life.\nNightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
