Is Eater of Hope legal in Standard, Modern, and Commander?

Eater of Hope is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is Eater of Hope?

Eater of Hope is a Creature — Demon. Its oracle text reads: "Flying {B}, Sacrifice another creature: Regenerate this creature. {2}{B}, Sacrifice two other creatures: Destroy target creature. *Gods can be appeased. Demons, however . . .* Power/Toughness: 6/4"