Is Gemstone Caverns legal in Standard, Modern, and Commander?

Gemstone Caverns is legal in: Modern, Legacy, Vintage, Commander, Historic.

Gemstone Caverns

Q: What type of card is Gemstone Caverns?

Gemstone Caverns is a Legendary Land. Its oracle text reads: "If this card is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand. {T}: Add {C}. If Gemstone Caverns has a luck counter on it, instead add one mana of any color."

Legendary Land

If this card is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand.

: Add . If Gemstone Caverns has a luck counter on it, instead add one mana of any color.