Is Muck Drubb legal in Standard, Modern, and Commander?

Muck Drubb is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Muck Drubb?

Muck Drubb is a Creature — Beast. Its oracle text reads: "Flash When this creature enters, change the target of target spell that targets only a single creature to this creature. Madness {2}{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.) Power/Toughness: 3/3"