Is Herigast, Erupting Nullkite legal in Standard, Modern, and Commander?

Herigast, Erupting Nullkite is legal in: Modern, Legacy, Vintage, Commander, Historic.

Herigast, Erupting Nullkite

Q: What type of card is Herigast, Erupting Nullkite?

Herigast, Erupting Nullkite is a Legendary Creature — Eldrazi Dragon. Its oracle text reads: "Emerge {6}{R}{R} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) When you cast this spell, you may exile your hand. If you do, draw three cards. Flying Each creature spell you cast has emerge. The emerge cost is equal to its mana cost."