Medomai the Ageless, Alesha, Who Smiles at Death, Spark Double, and Umbral Collar Zealot

Prerequisites

• Medomai the Ageless on the battlefield
• Alesha, Who Smiles at Death on the battlefield
• Spark Double in the graveyard
• Umbral Collar Zealot on the battlefield
• each turn available

Steps

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

Results

• Infinite turns