Berta, Wise Extrapolator + Animation Module + Blade of the Bloodchief + Yahenni, Undying Partisan

Berta, Wise Extrapolator

Animation Module

Blade of the Bloodchief

Yahenni, Undying Partisan

How it works

1. Activate Yahenni 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 Yahenni ability.
7. Repeat

This ingenious engine uses Yahenni, Undying Partisan's free sacrifice outlet to continuously send creatures to the graveyard, fueling a cascade of synergistic triggers. Every time a sacrifice happens, Blade of the Bloodchief places a +1/+1 counter on Berta, Wise Extrapolator, which in turn triggers Berta's mana-production ability and Animation Module's counter-reward. By using the mana generated by Berta to pay Animation Module's small fee, you continuously spawn fresh Servo tokens to feed back into Yahenni.