Is Bringer of the Black Dawn legal in Standard, Modern, and Commander?

Bringer of the Black Dawn is legal in: Modern, Legacy, Vintage, Commander, Historic.

Bringer of the Black Dawn

Q: What type of card is Bringer of the Black Dawn?

Bringer of the Black Dawn is a Creature — Bringer. Its oracle text reads: "You may pay {W}{U}{B}{R}{G} rather than pay this spell's mana cost. Trample At the beginning of your upkeep, you may pay 2 life. If you do, search your library for a card, then shuffle and put that card on top."