Is Scourge of Nel Toth legal in Standard, Modern, and Commander?

Scourge of Nel Toth is legal in: Legacy, Vintage, Commander.

What type of card is Scourge of Nel Toth?

Scourge of Nel Toth is a Creature — Zombie Dragon. Its oracle text reads: "Flying You may cast this creature from your graveyard by paying {B}{B} and sacrificing two creatures rather than paying its mana cost. *"May all the cairns of Jund be toppled." —Meren of Clan Nel Toth* Power/Toughness: 6/6"