Medomai the Ageless, Darksteel Mutation, and Capsize

Prerequisites

• Medomai the Ageless on the battlefield
• Darksteel Mutation in hand
• Capsize in hand
• each extra turn available

Steps

1. Deal combat damage using Medomai, triggering its ability, causing you to take an extra turn after this one
2. During your extra turn, cast Darksteel Mutation by paying , attaching it to Medomai
3. Declare Medomai as an attacker, as it does not have its restriction due to Darksteel Mutation
4. Holding priority, cast Capsize with buyback by paying , returning Darksteel Mutation and Capsize to your hand
5. Repeat from step 1

Results

• Infinite turns