Name:Creeping Tar Pit
ManaCost:no cost
Types:Land
K:CARDNAME enters the battlefield tapped.
A:AB$ Mana | Cost$ T | Produced$ Combo U B | SpellDescription$ Add {U} or {B}.
A:AB$ Animate | Cost$ 1 U B | Defined$ Self | Power$ 3 | Toughness$ 2 | Types$ Creature,Elemental | Colors$ Blue,Black | SubAbility$ DBUnblockable | SpellDescription$ CARDNAME becomes a 3/2 blue and black Elemental creature until end of turn and can't be blocked this turn. It's still a land.
SVar:DBUnblockable:DB$ Effect | ExileOnMoved$ Battlefield | RememberObjects$ Self | StaticAbilities$ Unblockable
SVar:Unblockable:Mode$ CantBlockBy | ValidAttacker$ Card.IsRemembered | Description$ This creature can't be blocked this turn.
DeckHas:Type$Elemental
Oracle:Creeping Tar Pit enters the battlefield tapped.\n{T}: Add {U} or {B}.\n{1}{U}{B}: Creeping Tar Pit becomes a 3/2 blue and black Elemental creature until end of turn and can't be blocked this turn. It's still a land.