Dementer

First Strike
Class Promotion Ranger (You may cast this spell by sacrificing a Ranger and pay it's mana cost reduced by that creature's converted mana cost.)
{b}{r}: Dementer gets +1/+0 until end of turn.
{1}{b/r}: Return target creature you control to its owner's hand.
{t}, Sacrifice Dementer: Deals X damage to each creature you don't control. Where X is its power.