Is Guardian Beast legal in Standard, Modern, and Commander?

Guardian Beast is legal in: Legacy, Vintage, Commander.

Guardian Beast

Q: What type of card is Guardian Beast?

Guardian Beast is a Creature — Beast. Its oracle text reads: "As long as Guardian Beast is untapped, noncreature artifacts you control can't be enchanted, they have indestructible, and other players can't gain control of them. This effect doesn't remove Auras already attached to those artifacts."

Creature — Beast

As long as Guardian Beast is untapped, noncreature artifacts you control can't be enchanted, they have indestructible, and other players can't gain control of them. This effect doesn't remove Auras already attached to those artifacts.

Set Arabian Nights

Rarity Rare

Artist Ken Meyer, Jr.