Baldin, Century Herdmaster is a rare Legendary Creature — Human Warrior card from Secret Lair Drop (SLD), collector number 428. Current market price: $5.14 (foil $5.49), TCGplayer market prices via Scryfall.
During your turn, each creature assigns combat damage equal to its toughness rather than its power. Whenever Baldin attacks, up to one hundred target creatures each get +0/+X until end of turn, where X is the number of cards in your hand.