Is Autarch Mammoth legal in Standard, Modern, and Commander?

Autarch Mammoth is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Autarch Mammoth

Q: What type of card is Autarch Mammoth?

Autarch Mammoth is a Creature — Elephant Mount. Its oracle text reads: "When this creature enters and whenever it attacks while saddled, create a 3/3 green Elephant creature token. Saddle 5 (Tap any number of other creatures you control with total power 5 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)"

Creature — Elephant Mount

When this creature enters and whenever it attacks while saddled, create a 3/3 green Elephant creature token.

Saddle 5 (Tap any number of other creatures you control with total power 5 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Set Aetherdrift

Rarity Uncommon

Mana Value 6

Artist Leonardo Santanna

Collector # 153

Scryfall Gatherer