Requires

Animation Module must be on the battlefield. Archangel of Thune must be on the battlefield. Krark-Clan Ironworks must be on the battlefield. Soul's Attendant must be on the battlefield. You have a way to cause a creature to enter the battlefield under your control. Mana needed:

Steps

1. Cause a creature to enter the battlefield under your control.
2. Soul's Attendant triggers, causing you to gain 1 life.
3. Archangel of Thune triggers, putting a +1/+1 counter on each creature you control.
4. Animation Module triggers for each counter placed this way.
5. Resolve all but one Animation Module trigger, choosing not to pay.
6. Resolve the last Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token.
7. When the Servo enters the battlefield, Soul's Attendant triggers.
8. Holding priority, activate Krark-Clan Ironworks by sacrificing the Servo, adding .
9. Resolve the Soul's Attendant trigger, causing you to gain 1 life.
10. Repeat from step 3.

Results