Corpse Cobble [Innistrad: Double Feature]

Set:	Innistrad: Double Feature
Type:	Instant
Rarity:	Uncommon
Cost:	{U}{B}

As an additional cost to cast this spell, sacrifice any number of creatures.
Create an X/X blue and black Zombie creature token with menace, where X is the total power of the sacrificed creatures.
Flashback {3}{U}{B} (You may cast this card from your graveyard for its flashback cost and any additional costs. Then exile it.)