Is Lumbering Falls legal in Standard, Modern, and Commander?

Lumbering Falls is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Lumbering Falls?

Lumbering Falls is a Land. Its oracle text reads: "Lumbering Falls enters tapped.{T}: Add {G} or {U}.{2}{G}{U}: Lumbering Falls becomes a 3/3 green and blue Elemental creature with hexproof until end of turn. It's still a land."

Lumbering Falls

Land

Lumbering Falls enters tapped.<br>: Add or .<br>: Lumbering Falls becomes a 3/3 green and blue Elemental creature with hexproof until end of turn. It's still a land.