Briarbridge Patrol is a uncommon Creature — Human Warrior card from Shadows over Innistrad (SOI), collector number 195. Current market price: $0.17 (foil $0.45), TCGplayer market prices via Scryfall.
Whenever this creature deals damage to one or more creatures, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") At the beginning of each end step, if you sacrificed three or more Clues this turn, you may put a creature card from your hand onto the battlefield.