Witch-Maw Nephilim + Animation Module + Pitiless Plunderer + Lab Rats + Ashnod's Altar

Witch-Maw Nephilim

Animation Module

Pitiless Plunderer

Lab Rats

Ashnod's Altar

How it works

1. Cast Lab Rats with buyback by paying 4.
2. Witch-Maw Nephilim's first ability triggers, putting two +1/+1 counters on it.
3. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
4. Activate Ashnod's Altar by sacrificing the Servo, adding CC.
5. When the Servo dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
6. Resolve Lab Rats, creating a 1/1 Rat creature token and returning Lab Rats to your hand.
7. Activate Ashnod's Altar by sacrificing the Rat, adding CC.
8. When the Rat dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
9. Activate the Treasures by tapping and sacrificing them, adding 1.
10. Repeat.

This intricate loop revolves around the recurring casting of Lab Rats with buyback, fueling a massive cascade of permanent growth and artifact generation. Each time you cast the spell, Witch-Maw Nephilim grows larger from its triggered ability, which in turn triggers Animation Module to churn out Servo tokens for a minimal mana investment. Ashnod's Altar converts those tokens—and the Rat tokens from the spell itself—into colorless mana, while Pitiless Plunderer quietly capitalizes on every single sacrifice by yielding valuable Treasure tokens to sustain the color requirements of the loop.