Is Grand Arbiter Augustin IV legal in Standard, Modern, and Commander?

Grand Arbiter Augustin IV is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Grand Arbiter Augustin IV?

Grand Arbiter Augustin IV is a Legendary Creature — Human Advisor. Its oracle text reads: "White spells you cast cost {1} less to cast. Blue spells you cast cost {1} less to cast. Spells your opponents cast cost {1} more to cast. *The Arbiter is a conduit of justice, a will so disciplined that it dispenses justice without ego or remorse.* Power/Toughness: 2/3"