Deformed Drakon

Devoid:(This card has no color)
Flying
You may sacrifice any number of creatures as you cast this card, if you do this spell costs {2} less to cast for each creature sacrificed this way.
When Deformed Drakon attacks, return target creature from your graveyard to the battle field that was sacrificed to cast this spell or has converted mana cost 3 or less. If you do it gain haste and is tapped and attacking. Exile it at the end of combat.