Berta, Wise Extrapolator + Animation Module + Blade of the Bloodchief + Carrion Feeder

Berta, Wise Extrapolator

Animation Module

Blade of the Bloodchief

Carrion Feeder

How it works

1. Activate Carrion Feeder by sacrificing another creature.
2. When the creature dies, Blade of the Bloodchief triggers, putting a +1/+1 counter on Berta.
3. Berta and Animation Module trigger.
4. Resolve the Berta trigger, adding 1.
5. Resolve the Animation Module trigger, causing you to pay 1 to create a 1/1 Servo artifact creature token.
6. Resolve the Carrion Feeder ability.
7. Repeat

This loop relies on a clever mana-positive and resource-generating chain fueled by Carrion Feeder as your dedicated sacrifice outlet. Whenever you sacrifice a creature to Carrion Feeder, Blade of the Bloodchief ensures a +1/+1 counter lands on Berta, Wise Extrapolator, which in turn triggers both Berta's mana-production and Animation Module's counter-creation ability. By spending the mana generated by Berta to pay Animation Module's small fee, you create a Servo token that immediately replenishes your sacrifice fodder, feeding right back into the cycle for infinite sacrifices, deaths, and counters.