Agrus Kos, Wojek Veteran is a rare Legendary Creature — Human Soldier card from Ravnica: City of Guilds (RAV), collector number 190. Current market price: $0.36 (foil $4.00), TCGplayer market prices via Scryfall.
Whenever Agrus Kos attacks, attacking red creatures get +2/+0 and attacking white creatures get +0/+2 until end of turn.