Medomai the Ageless, Alesha, Who Smiles at Death, Chameleon, Master of Disguise, and Phantom Train

Prerequisites

• Medomai the Ageless on the battlefield
• Alesha, Who Smiles at Death on the battlefield
• Chameleon, Master of Disguise in the graveyard
• Phantom Train on the battlefield
• each turn available

Steps

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

Results

• Infinite turns