Is General Tazri legal in Standard, Modern, and Commander?

General Tazri is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

General Tazri

Q: What type of card is General Tazri?

General Tazri is a Legendary Creature — Human Ally. Its oracle text reads: "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."