Vesuvan Shapeshifter
From Commander 2019 set
Vesuvan Shapeshifter
Creature — Shapeshifter
0/0
As this creature enters or is turned face up, you may choose another creature on the battlefield. If you do, until this creature 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