Animation Module + Scion of the Swarm + Phyrexian Altar + Soul's Attendant

Animation Module

Scion of the Swarm

Phyrexian Altar

Soul's Attendant

How it works

1. Cause a creature to enter the battlefield under your control.
2. Soul's Attendant triggers, causing you to gain 1 life.
3. Scion of the Swarm triggers, putting a +1/+1 counter on itself.
4. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
5. When the Servo enters the battlefield, Soul's Attendant triggers.
6. Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding 1.
7. Resolve the Soul's Attendant trigger, causing you to gain 1 life.
8. Repeat from step 3.

This loop transforms a modest life-gain trigger into a fully self-sustaining engine of growth and sacrifice. With Soul's Attendant watching the field, every creature that enters gains you life, which in turn fuels Scion of the Swarm to grow with a new +1/+1 counter. That counter instantly wakes up Animation Module, allowing you to pay the mana generated by sacrificing your previous creature to Phyrexian Altar to birth a fresh Servo token. Because the Servo enters the exact same way your original creature did, Soul's Attendant triggers all over again, locking this sequence into an endless cycle of creation, sacrifice, and ascension.