Is Svogthos, the Restless Tomb legal in Standard, Modern, and Commander?

Svogthos, the Restless Tomb is legal in: Modern, Legacy, Vintage, Commander.

Svogthos, the Restless Tomb

Q: What type of card is Svogthos, the Restless Tomb?

Svogthos, the Restless Tomb is a Land. Its oracle text reads: "{T}: Add {C}. {3}{B}{G}: Until end of turn, this land becomes a black and green Plant Zombie creature with "This creature's power and toughness are each equal to the number of creature cards in your graveyard." It's still a land."

Land

: Add .

: Until end of turn, this land becomes a black and green Plant Zombie creature with "This creature's power and toughness are each equal to the number of creature cards in your graveyard." It's still a land.