Animation Module + Intruder Alarm + Grumgully, the Generous

Animation Module

Intruder Alarm

Grumgully, the Generous

How it works

1. Cause a non-Human creature to enter the battlefield, which enters with at least one +1/+1 counter on it due to Grumgully.
2. Intruder Alarm and Animation Module trigger.
3. Resolve the Intruder Alarm trigger, untapping all creatures.
4. Holding priority, activate a mana-producing creature by tapping it, adding at least 1.
5. Resolve the Animation Module trigger, causing you to create a 1/1 Servo artifact creature token that enters the battlefield with at least one +1/+1 counter on it due to Grumgully.
6. Repeat from step 2.