Medomai the Ageless + Alesha, Who Smiles at Death + Yahenni, Undying Partisan + Chameleon, Master of Disguise

Medomai the Ageless

Alesha, Who Smiles at Death

Yahenni, Undying Partisan

Chameleon, Master of Disguise

How it works

1. Declare Alesha as an attacker.
2. Alesha triggers, causing you to pay U/BU/B 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 Yahenni by sacrificing Chameleon
6. Repeat each turn.

This clever loop locks down the game by chaining infinite extra turns through a clever bit of identity-copying. By leveraging Alesha, Who Smiles at Death to repeatedly cheat out Chameleon, Master of Disguise from the graveyard as a copy of Medomai the Ageless, you bypass Medomai's usual restriction against attacking during extra turns since the copy is legally a fresh attacker each time. To keep the cycle going and reset the board state for the next combat step, you simply use Yahenni, Undying Partisan's sacrifice ability to put the Chameleon copy safely away before the turn ends.