Medomai the Ageless + Alesha, Who Smiles at Death + Goblin Bombardment + Chameleon, Master of Disguise

Medomai the Ageless

Alesha, Who Smiles at Death

Goblin Bombardment

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 Goblin Bombardment by sacrificing Chameleon
6. Repeat each turn.

Alesha, Who Smiles at Death sets this entire loop in motion by reaching into your graveyard and bringing back Chameleon, Master of Disguise as a tapped and attacking copy of Medomai the Ageless, bypassing Medomai's usual restriction against attacking during extra turns since the copy enters the battlefield fresh. Because Chameleon enters as a nonlegendary copy retaining Medomai's identity, dealing combat damage triggers its extra turn ability while completely ignoring the legend rule. To prevent the loop from breaking on subsequent turns, Goblin Bombardment provides a clean way to sacrifice the copied Medomai in your second main phase, sending Chameleon back to the graveyard so Alesha can resurrect it all over again.