Name:River Sneak
ManaCost:1 U
Types:Creature Merfolk Warrior
PT:1/1
K:Unblockable
T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Creature.Merfolk+YouCtrl+Other | TriggerZones$ Battlefield | Execute$ TrigPump | TriggerDescription$ Whenever another Merfolk enters the battlefield under your control, CARDNAME gets +1/+1 until end of turn.
SVar:TrigPump:DB$ Pump | Defined$ Self | NumAtt$ 1 | NumDef$ 1
SVar:Picture:http://www.wizards.com/global/images/magic/general/river_sneak.jpg
Oracle:River Sneak can't be blocked.\nWhenever another Merfolk enters the battlefield under your control, River Sneak gets +1/+1 until end of turn.