Kakashi, The Imitator

As this creature enters the battlefield, it enters as a copy of target creature on the battlefield, in a graveyard, in exile, or in the command zone. Except that it has Kakashi's other abilities.

{2}{b},{t}: Each player mills 2 cards, then Kakashi turns into
a copy of target creature on the battlefield, in a graveyard, in exile, or in the command zone. Except that it has Kakashi's other abilities.

"Send me your list!"
—Kakashi, The Imitator.