Countryside Crusher is a rare Creature — Giant Warrior card from Modern Masters (MMA), collector number 108. Current market price: $0.44 (foil $2.09), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, reveal the top card of your library. If it's a land card, put it into your graveyard and repeat this process. Whenever a land card is put into your graveyard from anywhere, put a +1/+1 counter on this creature.