Artifact Creature — Construct
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.)
You choose whether to put +1/+1 counters on the creature or create Servo tokens as the fabricate ability is resolving. No player may take actions between the time you choose and the time that counters are added or tokens are created.
If you can’t put +1/+1 counters on the creature for any reason as fabricate resolves (for instance, if it’s no longer on the battlefield), you just create Servo tokens.