Name:Suspicious Stowaway
ManaCost:1 U
Types:Creature Human Rogue Werewolf
PT:1/1
S:Mode$ CantBlockBy | ValidAttacker$ Creature.Self | Description$ CARDNAME can't be blocked.
T:Mode$ DamageDone | ValidSource$ Card.Self | ValidTarget$ Player | CombatDamage$ True | Execute$ TrigDraw | TriggerZones$ Battlefield | TriggerDescription$ Whenever CARDNAME deals combat damage to a player, draw a card, then discard a card.
SVar:TrigDraw:DB$ Draw | NumCards$ 1 | Defined$ You | SubAbility$ DBDiscard
SVar:DBDiscard:DB$ Discard | Defined$ You | Mode$ TgtChoose | NumCards$ 1
K:Daybound
DeckHas:Ability$Discard
AlternateMode:DoubleFaced
Oracle:Suspicious Stowaway can't be blocked.\nWhenever Suspicious Stowaway deals combat damage to a player, draw a card, then discard a card.\nDaybound (If a player casts no spells during their own turn, it becomes night next turn.)

ALTERNATE

Name:Seafaring Werewolf
ManaCost:no cost
Colors:green
Types:Creature Werewolf
PT:2/1
S:Mode$ CantBlockBy | ValidAttacker$ Creature.Self | Description$ CARDNAME can't be blocked.
T:Mode$ DamageDone | ValidSource$ Card.Self | ValidTarget$ Player | CombatDamage$ True | Execute$ TrigDrawN | TriggerZones$ Battlefield | TriggerDescription$ Whenever CARDNAME deals combat damage to a player, draw a card.
SVar:TrigDrawN:DB$ Draw | NumCards$ 1 | Defined$ You
K:Nightbound
Oracle:Seafaring Werewolf can't be blocked.\nWhenever Seafaring Werewolf deals combat damage to a player, draw a card.\nNightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
