Champions of the Perfect is a rare Creature — Elf Warrior card from Lorwyn Eclipsed (ECL), collector number 365. Current market price: $2.47 (foil $2.25), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, behold an Elf and exile it. (Exile an Elf you control or an Elf card from your hand.) Whenever you cast a creature spell, draw a card. When this creature leaves the battlefield, return the exiled card to its owner's hand.