Vatti, The Shadowblayde

Whenever one or more +1/+1 counters are placed on a creature you control, you may pay {1}. If you do create a 1/1 colorless Servo artifact creature token.
Fabricate 1 (When this creature enters the battlefield, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)