Is Isolated Watchtower legal in Standard, Modern, and Commander?

Isolated Watchtower is legal in: Legacy, Vintage, Commander.

Isolated Watchtower

Q: What type of card is Isolated Watchtower?

Isolated Watchtower is a Land. Its oracle text reads: "{T}: Add {C}. {2}, {T}: Scry 1, then you may reveal the top card of your library. If a basic land card is revealed this way, put it onto the battlefield tapped. Activate only if an opponent controls at least two more lands than you."

Land

: Add .

, : Scry 1, then you may reveal the top card of your library. If a basic land card is revealed this way, put it onto the battlefield tapped. Activate only if an opponent controls at least two more lands than you.