Is Rivaz of the Claw legal in Standard, Modern, and Commander?

Rivaz of the Claw is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Rivaz of the Claw

Q: What type of card is Rivaz of the Claw?

Rivaz of the Claw is a Legendary Creature — Lizard Warlock. Its oracle text reads: "Menace {T}: Add two mana in any combination of colors. Spend this mana only to cast Dragon creature spells. Once during each of your turns, you may cast a Dragon creature spell from your graveyard. Whenever you cast a Dragon creature spell from your graveyard, it gains "When this creature dies, exile it.""