Wattson, Arbitrary Conduit

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.)
Whenever Wattson attacks, create a 1/1 blue Construst artifact creature token that enters the battlefield tapped and attacking.
Artifact creatures you control get +1/+1 for each tapped noncreature artifact.