Is Tah-Crop Elite legal in Standard, Modern, and Commander?

Tah-Crop Elite is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Tah-Crop Elite

Q: What type of card is Tah-Crop Elite?

Tah-Crop Elite is a Creature — Bird Warrior. Its oracle text reads: "Flying You may exert this creature as it attacks. When you do, creatures you control get +1/+1 until end of turn. (An exerted creature won't untap during your next untap step.)"

Creature — Bird Warrior

$0.05 ↗20 similarCommander, Modern

Flying

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

Set Amonkhet

Rarity Common

Mana Value 4

Artist Raoul Vitale

Collector # 31