Is Gust-Skimmer legal in Standard, Modern, and Commander?

Gust-Skimmer is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Gust-Skimmer

Q: What type of card is Gust-Skimmer?

Gust-Skimmer is an Artifact Creature — Insect. Its oracle text reads: "{U}: This creature gains flying until end of turn. *Phyrexian smog clouds choked the skies, threatening creatures who couldn't comprehend the menace below.* Power/Toughness: 2/1"