Is Ghostly Changeling legal in Standard, Modern, and Commander?

Ghostly Changeling is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Ghostly Changeling?

Ghostly Changeling is a Creature — Shapeshifter. Its oracle text reads: "Changeling (This card is every creature type.) {1}{B}: This creature gets +1/+1 until end of turn. *In desolate places, changelings may take the shape of fancies, or memories, or fears.* Power/Toughness: 2/2"