Technomancer + Thermopod + Auton Soldier

Technomancer

Thermopod

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 Thermopod 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 loop relies on the clever cloning properties of Auton Soldier to continually re-enter the battlefield as a copy of Technomancer, whose enter-the-battlefield trigger pulls the Auton Soldier right back out of the graveyard. While the resulting sacrifice chain is underway, Thermopod acts as your crucial mana engine by converting those repeated sacrifices into an endless supply of red mana.