Brambleguard Veteran is a uncommon Creature — Raccoon Warrior card from Bloomburrow (BLB), collector number 165. Current market price: $0.23 (foil $0.31), TCGplayer market prices via Scryfall.
Whenever you expend 4, Raccoons you control get +1/+1 and gain vigilance until end of turn. (You expend 4 as you spend your fourth total mana to cast spells during a turn.)