Selvala's Enforcer is a common Creature — Elf Warrior card from Conspiracy (CNS), collector number 40. Current market price: $0.14 (foil $0.15), TCGplayer market prices via Scryfall.
Parley — When this creature enters, each player reveals the top card of their library. For each nonland card revealed this way, put a +1/+1 counter on this creature. Then each player draws a card.