Is Unswerving Sloth legal in Standard, Modern, and Commander?

Unswerving Sloth is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Unswerving Sloth

Q: What type of card is Unswerving Sloth?

Unswerving Sloth is a Creature — Sloth Mount. Its oracle text reads: "Whenever this creature attacks while saddled, it gains indestructible until end of turn. Untap all creatures you control. Saddle 4 (Tap any number of other creatures you control with total power 4 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)"

Creature — Sloth Mount

Whenever this creature attacks while saddled, it gains indestructible until end of turn. Untap all creatures you control.

Saddle 4 (Tap any number of other creatures you control with total power 4 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Set Aetherdrift

Rarity Uncommon

Mana Value 5

Artist Daren Bader

Collector # 34

Scryfall Gatherer