Is Stone Giant legal in Standard, Modern, and Commander?

Stone Giant is legal in: Modern, Legacy, Vintage, Commander.

Stone Giant

Q: What type of card is Stone Giant?

Stone Giant is a Creature — Giant. Its oracle text reads: "{T}: Target creature you control with toughness less than Stone Giant's power gains flying until end of turn. Destroy that creature at the beginning of the next end step."

Creature — Giant

: Target creature you control with toughness less than Stone Giant's power gains flying until end of turn. Destroy that creature at the beginning of the next end step.