Medomai the Ageless + Alesha, Who Smiles at Death + Altar of Dementia + Auton Soldier

Medomai the Ageless

Alesha, Who Smiles at Death

Altar of Dementia

Auton Soldier

How it works

1. Declare Alesha as an attacker.
2. Alesha triggers, causing you to pay U/BU/B 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 Altar of Dementia by sacrificing Auton Soldier
6. Repeat each turn.