Is Dracosaur Auxiliary legal in Standard, Modern, and Commander?

Dracosaur Auxiliary is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Dracosaur Auxiliary

Q: What type of card is Dracosaur Auxiliary?

Dracosaur Auxiliary is a Creature — Dinosaur Dragon Mount. Its oracle text reads: "Flying, haste Whenever this creature attacks while saddled, it deals 2 damage to any target. Saddle 3 (Tap any number of other creatures you control with total power 3 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.) Power/Toughness: 4/4"

Creature — Dinosaur Dragon Mount

Flying, haste

Whenever this creature attacks while saddled, it deals 2 damage to any target.

Saddle 3 (Tap any number of other creatures you control with total power 3 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Power/Toughness: 4/4

Set Aetherdrift

Rarity Uncommon

Mana Value 6

Artist Brian Valeza

Collector # 122

Scryfall