Jia Joriah, the Palimpsest

When Jia enters the battlefield, create a legendary 1/1 colorless Servo artifact creature token named Jia's Masterpiece.
Whenever a nontoken artifact enters the battlefield, you may pay {1} or {e}. If you do, target legendary Servo becomes a copy of it except it's still a legendary 1/1 Servo creature. Put a +1/+1 counter on it.