Animation Module
Artifact
Whenever one or more +1/+1 counters are put on a permanent you control, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.
, 
: Choose a counter on target permanent or player. Give that permanent or player another counter of that kind.
Design leads to progress.
Aaron Miller
Kaladesh Promos (PKLD)
• #194sRulings
Abilities that trigger when counters are put on a permanent trigger when a permanent enters the battlefield with counters and when a player puts counters on a permanent.
(wotc • 2016-09-20)
You can pay {1} only once each time Animation Module's first ability resolves. You can't pay more to create extra Servo tokens.
(wotc • 2016-09-20)
If +1/+1 counters are put on more than one permanent you control at the same time, Animation Module's first ability triggers once for each of those permanents.
(wotc • 2016-09-20)
Rulings
Abilities that trigger when counters are put on a permanent trigger when a permanent enters the battlefield with counters and when a player puts counters on a permanent.
(wotc • 2016-09-20)
You can pay {1} only once each time Animation Module's first ability resolves. You can't pay more to create extra Servo tokens.
(wotc • 2016-09-20)
If +1/+1 counters are put on more than one permanent you control at the same time, Animation Module's first ability triggers once for each of those permanents.
(wotc • 2016-09-20)