Is Nissa Revane legal in Standard, Modern, and Commander?

Nissa Revane is legal in: Modern, Legacy, Vintage, Commander.

Nissa Revane

Q: What type of card is Nissa Revane?

Nissa Revane is a Legendary Planeswalker — Nissa. Its oracle text reads: "+1: Search your library for a card named Nissa's Chosen, put it onto the battlefield, then shuffle. +1: You gain 2 life for each Elf you control. −7: Search your library for any number of Elf creature cards, put them onto the battlefield, then shuffle."