Medomai the Ageless, Alesha, Who Smiles at Death, Sakashima the Impostor, and Phantom Train

Prerequisites

• Medomai the Ageless on the battlefield
• Alesha, Who Smiles at Death on the battlefield
• Sakashima the Impostor 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 Sakashima the Impostor from your graveyard to the battlefield tapped and attacking as a legendary copy of Medomai the Ageless whose name is still Sakashima the Impostor
3. Deal combat damage using Sakashima the Impostor
4. Sakashima the Impostor triggers, causing you to take an extra turn after this one
5. Activate Phantom Train by sacrificing Sakashima the Impostor Repeat each turn

Results

• Infinite turns