Champion of Lambholt is a rare Creature — Human Warrior card from Avacyn Restored (AVR), collector number 171. Current market price: $2.89 (foil $19.64), TCGplayer market prices via Scryfall.
Creatures with power less than this creature's power can't block creatures you control. Whenever another creature you control enters, put a +1/+1 counter on this creature.