Vesuvan Shapeshifter

Vesuvan Shapeshifter

Creature - Shapeshifter (CMC 5)
As Vesuvan Shapeshifter enters the battlefield or is turned face up, you may choose another creature on the battlefield. If you do, until Vesuvan Shapeshifter is turned face down, it becomes a copy of that creature, except it has "At the beginning of your upkeep, you may turn this creature face down."
Morph