Is Insatiable Gorgers legal in Standard, Modern, and Commander?

Insatiable Gorgers is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Insatiable Gorgers?

Insatiable Gorgers is a Creature — Vampire Berserker. Its oracle text reads: "This creature attacks each combat if able. Madness {3}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)"