Is Necrogoyf legal in Standard, Modern, and Commander?

Necrogoyf is legal in: Modern, Legacy, Vintage, Commander, Historic.

Necrogoyf

Q: What type of card is Necrogoyf?

Necrogoyf is a Creature — Lhurgoyf. Its oracle text reads: "Necrogoyf's power is equal to the number of creature cards in all graveyards. At the beginning of each player's upkeep, that player discards a card. Madness {1}{B}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)"