Is Gust Walker legal in Standard, Modern, and Commander?

Gust Walker is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Gust Walker

Q: What type of card is Gust Walker?

Gust Walker is a Creature — Human Wizard. Its oracle text reads: "You may exert this creature as it attacks. When you do, it gets +1/+1 and gains flying until end of turn. (An exerted creature won't untap during your next untap step.) *"I'm never unarmed."* Power/Toughness: 2/2"

Creature — Human Wizard

You may exert this creature as it attacks. When you do, it gets +1/+1 and gains flying until end of turn. (An exerted creature won't untap during your next untap step.)

*"I'm never unarmed."*

Power/Toughness: 2/2

Set Amonkhet

Rarity Common

Mana Value 2

Artist Jason Rainville

Collector # 17

Scryfall