Animation Module + Sigil Captain + Ashnod's Altar

Animation Module

Sigil Captain

Ashnod's Altar

How it works

1. Put a +1/+1 counter on a creature you control.
2. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
3. When the Servo enters the battlefield, Sigil Captain triggers, putting two +1/+1 counters on the Servo.
4. Animation Module triggers, holding priority, activate Ashnod's Altar by sacrificing the Servo, adding CC.
5. Resolve the Animation Module trigger, causing you to pay 1 to create a 1/1 Servo artifact creature token.
6. Repeat from step 3.

This clever loop turns a single counter into an engine by letting Sigil Captain supercharge every new arrival, upgrading a humble 1/1 Servo into a heavily armored threat the moment it hits the battlefield. Animation Module spots those incoming +1/+1 counters to churn out tokens on demand, while Ashnod's Altar promptly breaks down the resulting creations for the raw mana needed to sustain the entire cycle. The net result is a self-funding assembly line that generates boundless colorless mana alongside an endless swarm of artifact creatures.