Is Graven Lore legal in Standard, Modern, and Commander?

Graven Lore is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Graven Lore?

Graven Lore is a Snow Instant. Its oracle text reads: "Scry X, where X is the amount of {S} spent to cast this spell, then draw three cards. ({S} is mana from a snow source.) *The runes glow beneath the snow, bearing memories of a time when the old gods ruled the realms.*"