Technomancer + Carrion Feeder + Auton Soldier

Technomancer

Carrion Feeder

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 Carrion Feeder 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 elegant loop hinges on Technomancer and Auton Soldier continuously reanimating each other by entering the battlefield as a fresh copy of the original artifact creature. Because Auton Soldier enters as a copy of Technomancer with a combined total mana value well under the six-mana threshold, it perpetually recycles itself from the graveyard while milling your library along the way. Meanwhile, Carrion Feeder acts as the designated sacrificial outlet to send the copying Technomancer back to the graveyard at instant speed, growing its own power with endless +1/+1 counters while generating an infinite storm of artifact and creature death triggers.