Medomai the Ageless, Metamorphic Alteration, and Mistmeadow Vanisher

Prerequisites

• Medomai the Ageless on the battlefield
• Metamorphic Alteration in hand
• Mistmeadow Vanisher on the battlefield
• An opponent cannot block Medomai
• the first turn available

Steps

1. Cast Metamorphic Alteration by paying , attaching it to Medomai, naming Mistmeadow Vanisher and causing Medomai to become a copy of Mistmeadow Vanisher
2. Declare Medomai as an attacker
3. Medomai triggers, exiling Metamorphic Alteration until your end step
4. When Metamorphic Alteration leaves the battlefield, Medomai is no longer a copy of Mistmeadow Vanisher
5. Deal combat damage using Medomai
6. Medomai triggers, causing you to take an extra turn after this one
7. At the beginning of your end step, Medomai triggers, returning Metamorphic Alteration to the battlefield from exile attached it to Medomai, naming Mistmeadow Vanisher and causing Medomai to become a copy of Mistmeadow Vanisher
8. Repeat from step 2 each turn

Results

• Infinite turns