Is Mutable Explorer legal in Standard, Modern, and Commander?

Mutable Explorer is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Mutable Explorer

Q: What type of card is Mutable Explorer?

Mutable Explorer is a Creature — Shapeshifter. Its oracle text reads: "Changeling (This card is every creature type.) When this creature enters, create a tapped Mutavault token. (It's a land with "{T}: Add {C}" and "{1}: This token becomes a 2/2 creature with all creature types until end of turn. It's still a land.")"

Creature — Shapeshifter

$1.67 ↗20 similarCommander, Modern

Changeling (This card is every creature type.)

When this creature enters, create a tapped Mutavault token. (It's a land with ": Add " and ": This token becomes a 2/2 creature with all creature types until end of turn. It's still a land.")