Is Unstable Frontier legal in Standard, Modern, and Commander?

Unstable Frontier is legal in: Modern, Legacy, Vintage, Commander.

Unstable Frontier

Q: What type of card is Unstable Frontier?

Unstable Frontier is a Land. Its oracle text reads: "{T}: Add {C}. {T}: Target land you control becomes the basic land type of your choice until end of turn. *The goblins went to sleep in Jund and awoke in Grixis. They'd never seen a zombie before. They would never see one again.*"