Is Fiend Artisan legal in Standard, Modern, and Commander?

Fiend Artisan is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Fiend Artisan

Q: What type of card is Fiend Artisan?

Fiend Artisan is a Creature — Nightmare. Its oracle text reads: "This creature gets +1/+1 for each creature card in your graveyard. {X}{B/G}, {T}, Sacrifice another creature: Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle. Activate only as a sorcery. Power/Toughness: 1/1"

Creature — Nightmare

This creature gets +1/+1 for each creature card in your graveyard.

, , Sacrifice another creature: Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle. Activate only as a sorcery.