Is Dimir Doppelganger legal in Standard, Modern, and Commander?

Dimir Doppelganger is legal in: Modern, Legacy, Vintage, Commander.

Dimir Doppelganger

Q: What type of card is Dimir Doppelganger?

Dimir Doppelganger is a Creature — Shapeshifter. Its oracle text reads: "{1}{U}{B}: Exile target creature card from a graveyard. This creature becomes a copy of that card, except it has this ability. *"Fear not. Your life will not go unlived."* Power/Toughness: 0/2"