Champion of the Path (Lorwyn Eclipsed 362) - Rare Magic: The Gathering Card

As an additional cost to cast this spell, behold an Elemental and exile it. (Exile an Elemental you control or an Elemental card from your hand.)Whenever another Elemental you control enters, it deals damage equal to its power to each opponent.When this creature leaves the battlefield, return the exiled card to its owner's hand.