Technomancer + Atog + Auton Soldier

Technomancer

Atog

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 Atog 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 infinite loop revolves around leveraging Technomancer's enter-the-battlefield ability to continuously recur a cloned threat from the graveyard. By having Auton Soldier enter the battlefield as a copy of Technomancer, it triggers the same recursion effect to bring itself right back. Atog provides the crucial sacrifice outlet that sends the cloning Auton Soldier back to the graveyard in response to its own trigger, allowing the cycle to repeat indefinitely for massive sacrifice and enter-the-battlefield value.