Is Flowstone Sculpture legal in Standard, Modern, and Commander?

Flowstone Sculpture is legal in: Legacy, Vintage, Commander.

Flowstone Sculpture

Q: What type of card is Flowstone Sculpture?

Flowstone Sculpture is an Artifact Creature — Shapeshifter. Its oracle text reads: "{2}, Discard a card: Put a +1/+1 counter on this creature or this creature gains flying, first strike, or trample. (This effect lasts indefinitely.) *The sculptor, weary of his work, created art that would finish itself.* Power/Toughness: 4/4"