Is Demon's Herald legal in Standard, Modern, and Commander?

Demon's Herald is legal in: Modern, Legacy, Vintage, Commander.

Demon's Herald

Q: What type of card is Demon's Herald?

Demon's Herald is a Creature — Human Wizard. Its oracle text reads: "{2}{B}, {T}, Sacrifice a blue creature, a black creature, and a red creature: Search your library for a card named Prince of Thralls, put it onto the battlefield, then shuffle."

Creature — Human Wizard

, , Sacrifice a blue creature, a black creature, and a red creature: Search your library for a card named Prince of Thralls, put it onto the battlefield, then shuffle.