The Legend of Kuruk // Avatar Kuruk + Emiel the Blessed + Auton Soldier

The Legend of Kuruk // Avatar Kuruk

Emiel the Blessed

Auton Soldier

How it works

1. Activate Auton Soldier using Avatar Kuruk's ability by paying 20 minus 1 for each creature and/or artifact you can tap while activating it, causing you to take an extra turn after this one.
2. Activate Emiel by paying 3, blinking Auton Soldier. Choose to have it enter the battlefield as a copy of Avatar Kuruk.
3. Repeat each turn.

This elegant loop hinges on manipulating the legendary rule using Auton Soldier, which enters as a nonlegendary copy of Avatar Kuruk (the back face of The Legend of Kuruk) to bypass the restriction and let you keep both. With the cloned Avatar Kuruk on the field, its potent Exhaust ability becomes available, allowing you to pay {20} (discounted by tapping your other artifacts and creatures) to take an extra turn. From there, you simply use Emiel the Blessed to blink the Auton Soldier, resetting its clone target so it can re-enter as Avatar Kuruk anew on subsequent turns, securing endless extra turns and total control.