Is Servant of Volrath legal in Standard, Modern, and Commander?

Servant of Volrath is legal in: Legacy, Vintage, Commander, Pauper.

Servant of Volrath

Q: What type of card is Servant of Volrath?

Servant of Volrath is a Creature — Minion. Its oracle text reads: "When this creature leaves the battlefield, sacrifice a creature. *"Volrath is a harsh master. My reflection is a constant reminder of that." —Greven *il*-Vec* Power/Toughness: 3/3"