Is Fierce Witchstalker legal in Standard, Modern, and Commander?

Fierce Witchstalker is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Fierce Witchstalker

Q: What type of card is Fierce Witchstalker?

Fierce Witchstalker is a Creature — Wolf. Its oracle text reads: "Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) When this creature enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")"