Is Skemfar Elderhall legal in Standard, Modern, and Commander?

Skemfar Elderhall is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Skemfar Elderhall

Q: What type of card is Skemfar Elderhall?

Skemfar Elderhall is a Land. Its oracle text reads: "This land enters tapped. {T}: Add {G}. {2}{B}{B}{G}, {T}, Sacrifice this land: Up to one target creature you don't control gets -2/-2 until end of turn. Create two 1/1 green Elf Warrior creature tokens. Activate only as a sorcery."

Land

This land enters tapped.

: Add .

, , Sacrifice this land: Up to one target creature you don't control gets -2/-2 until end of turn. Create two 1/1 green Elf Warrior creature tokens. Activate only as a sorcery.