Is Memorial to Unity legal in Standard, Modern, and Commander?

Memorial to Unity is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Memorial to Unity

Q: What type of card is Memorial to Unity?

Memorial to Unity is a Land. Its oracle text reads: "This land enters tapped. {T}: Add {G}. {2}{G}, {T}, Sacrifice this land: Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Then put the rest on the bottom of your library in a random order."

Land

This land enters tapped.

: Add .

, , Sacrifice this land: Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Then put the rest on the bottom of your library in a random order.