Champion of the Weird is a rare Creature — Goblin Berserker card from Lorwyn Eclipsed (ECL), collector number 360. Current market price: $0.38 (foil $0.66), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, behold a Goblin and exile it. (Exile a Goblin you control or a Goblin card from your hand.) Pay 1 life, Blight 2: Target opponent blights 2. Activate only as a sorcery. When this creature leaves the battlefield, return the exiled card to its owner's hand.