Animation Module + Archangel of Thune + Phyrexian Altar + Soul Warden

Animation Module

Archangel of Thune

Phyrexian Altar

Soul Warden

How it works

1. Cause a creature to enter the battlefield under your control.
2. Soul Warden 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 1 to create a 1/1 Servo artifact creature token.
7. When the Servo enters the battlefield, Soul Warden triggers.
8. Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding 1.
9. Resolve the Soul Warden trigger, causing you to gain 1 life.
10. Repeat from step 3.

This charming loop begins the moment Soul Warden rewards you with life whenever a creature enters the battlefield, which immediately fires off Archangel of Thune to blanket your board in +1/+1 counters. Every single counter placed this way wakes up Animation Module, letting you turn a single mana into a fresh 1/1 Servo artifact creature token. When that Servo enters, Soul Warden sees it and grants the life needed to keep the cycle going, while Phyrexian Altar provides the easy sacrifice outlet to turn that very token into the exact mana required to pay for Animation Module's trigger.