Is Liliana of the Dark Realms legal in Standard, Modern, and Commander?

Liliana of the Dark Realms is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Liliana of the Dark Realms?

Liliana of the Dark Realms is a Legendary Planeswalker — Liliana. Its oracle text reads: "+1: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.−3: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control.−6: You get an emblem with "Swamps you control have '{T}: Add {B}{B}{B}{B}.'""

Liliana of the Dark Realms

Legendary Planeswalker — Liliana

+1: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.<br>−3: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control.<br>−6: You get an emblem with "Swamps you control have ': Add .'"