Medomai the Ageless, Alesha, Who Smiles at Death, Auton Soldier, and Yahenni, Undying Partisan

Prerequisites

• Medomai the Ageless on the battlefield
• Alesha, Who Smiles at Death on the battlefield
• Auton Soldier in the graveyard
• Yahenni, Undying Partisan on the battlefield
• An opponent cannot block creatures you control
• Alesha does not have summoning sickness
• each turn available

Steps

1. Declare Alesha as an attacker
2. Alesha triggers, causing you to pay to return Auton Soldier from your graveyard to the battlefield tapped and attacking as a nonlegendary copy of Medomai the Ageless
3. Deal combat damage using Auton Soldier
4. Auton Soldier triggers, causing you to take an extra turn after this one
5. Activate Yahenni by sacrificing Auton Soldier Repeat each turn

Results

• Infinite turns