Technomancer + Extruder + Auton Soldier

Technomancer

Extruder

Auton Soldier

How it works

1. Cast Technomancer by paying 5.
2. When Technomancer enters, it triggers, causing you to mill three cards and return Auton Soldier from your graveyard to the battlefield as a copy of Technomancer.
3. When Auton Soldier enters, it triggers. Holding priority, activate Extruder by sacrificing Auton Soldier.
4. Resolve the Auton Soldier trigger, causing you to mill three cards and return Auton Soldier from your graveyard to the battlefield as a copy of Technomancer.
5. Repeat from step 3.

This clever loop leverages Extruder as a free sacrifice outlet that feeds +1/+1 counters to your creatures while clearing the way for recursion. By using Technomancer to bring back Auton Soldier copying Technomancer itself, you establish a self-sustaining loop of entering-the-battlefield and death triggers. Because Auton Soldier enters as a fresh copy of Technomancer, its own ETB triggers anew to continuously pull the chain forward from your graveyard, fueled entirely by Extruder's ability to instantly bin it right back.