Xavier Sal, Infested Captain + Animation Module + Thornbite Staff + Workhorse

Xavier Sal, Infested Captain

Animation Module

Thornbite Staff

Workhorse

How it works

1. Activate Xavier Sal's second ability by tapping it and sacrificing a creature.
2. When the creature dies, Xavier Sal triggers, untapping Xavier Sal.
3. Resolve the Xavier Sal ability from step 1, putting a +1/+1 counter on Workhorse.
4. Animation Module triggers, holding priority, activate Workhorse by removing a +1/+1 counter from it, adding C.
5. Resolve the Animation Module trigger, causing you to pay 1 to create a 1/1 Servo artifact creature token.
6. Repeat.
7. If you control another creature with a +1/+1 counter on it, you will get infinite +1/+1 counters among creatures you control, and you may instead use Xavier Sal's first ability to get infinite copies of creature tokens you control.

This intricate loop turns Xavier Sal, Infested Captain into a relentless engine of sacrifice and growth, neatly outfitted with Thornbite Staff to ensure he immediately untaps whenever a creature bites the dust. By feeding creatures to Xavier Sal's second ability, you trigger the Staff's untap ability while distributing counters—which in turn awakens Animation Module whenever a +1/+1 counter lands on a permanent. Workhorse plays a crucial role here as both a sacrificial lamb and a mana source, spending its own +1/+1 counters to generate the generic mana needed to pay for the Module's triggered ability. The result is a self-sustaining cycle of death, taxes, and mechanical replication that effortlessly yields infinite tokens, sacrifices, and proliferations.