Is Sheltered Valley legal in Standard, Modern, and Commander?

Sheltered Valley is legal in: Legacy, Vintage, Commander.

Sheltered Valley

Q: What type of card is Sheltered Valley?

Sheltered Valley is a Land. Its oracle text reads: "If Sheltered Valley would enter, instead sacrifice each other permanent named Sheltered Valley you control, then put Sheltered Valley onto the battlefield.At the beginning of your upkeep, if you control three or fewer lands, you gain 1 life.{T}: Add {C}."

Land

If Sheltered Valley would enter, instead sacrifice each other permanent named Sheltered Valley you control, then put Sheltered Valley onto the battlefield.<br>At the beginning of your upkeep, if you control three or fewer lands, you gain 1 life.<br>: Add .