Mutable Explorer

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.")

"It had been to warrens and kithkin taverns, but found a home in the hidden cavern."

—The Changeling's Search