Animation Module + Cleric Class + Healer of the Pride + Phyrexian Altar

Animation Module

Cleric Class

Healer of the Pride

Phyrexian Altar

How it works

1. Gain life.
2. Cleric Class triggers, putting a +1/+1 counter on a creature you control.
3. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
4. When the Servo enters, Healer of the Pride triggers, causing you to gain life.
5. Cleric Class triggers. Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding 1.
6. Resolve the Cleric Class trigger, putting a +1/+1 counter on a creature you control.
7. Repeat from step 3.

This elegant loop transforms a single instance of life gain into an endless cascade of life, tokens, and mana by closing the circuit between four distinct permanents. Healer of the Pride acts as your engine's heart, turning every newly minted creature into the life gain needed to fuel Cleric Class, which obligingly drops a +1/+1 counter onto your board. That counter placement immediately awakens Animation Module, giving you the chance to pay a single mana and birth a fresh Servo artifact creature token. Finally, Phyrexian Altar lets you sacrifice that very same Servo to generate the exact {1} mana required to pay for Animation Module's trigger, sustaining the loop indefinitely while churning out infinite sacrifices and death triggers.