Is Bounding Felidar legal in Standard, Modern, and Commander?

Bounding Felidar is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Bounding Felidar?

Bounding Felidar is a Creature — Cat Beast Mount.

Creature — Cat Beast Mount

Set OTJ

Rarity Uncommon

Mana Value 6

Artist Lars Grant-West

Collector # 5

Scryfall Gatherer

Creature Standard Modern Pioneer