Medomai the Ageless + Assimilation Aegis + Auriok Windwalker

Medomai the Ageless

Assimilation Aegis

Auriok Windwalker

How it works

1. Declare a creature you control that cannot be blocked by an opponent as an attacker.
2. Holding priority, activate Auriok Windwalker by tapping it, attaching Assimilation Aegis to the attacking creature.
3. Assimilation Aegis' second ability triggers, causing the creature to become a copy of Medomai the Ageless.
4. Deal combat damage with the creature.
5. The creature triggers, causing you to take an extra turn after this one.
6. Move to your next turn.
7. Activate Assimilation Aegis' equip ability by paying 2, attaching it to any other creature you control except Auriok Windwalker.
8. Assimilation Aegis' second ability triggers, causing the creature to become a copy of Medomai the Ageless.
9. Repeat.

By using Auriok Windwalker to rapidly swap who is holding Assimilation Aegis, you bypass Medomai the Ageless's restriction against attacking during extra turns. Because Medomai the Ageless can't attack on extra turns, you avoid that restriction entirely by having a different creature step into the role on each subsequent turn. Whenever Assimilation Aegis attaches to your chosen attacker, it copies the legendary sphinx so that every successful strike grants you another consecutive turn.