General Tazri is a mythic Legendary Creature — Human Ally card from Oath of the Gatewatch (OGW), collector number 19. Current market price: $0.85 (foil $12.50), TCGplayer market prices via Scryfall.
When General Tazri enters, you may search your library for an Ally creature card, reveal it, put it into your hand, then shuffle. {W}{U}{B}{R}{G}: Ally creatures you control get +X/+X until end of turn, where X is the number of colors among those creatures.