Gonti's Aether Heart + Mishra, Eminent One + Panharmonicon

Gonti's Aether Heart

Mishra, Eminent One

Panharmonicon

How it works

1. At the beginning of combat, Mishra triggers, creating a 4/4 artifact creature token copy of Gonti's Aether Heart named Mishra's Warform.
2. When Mishra's Warform enters the battlefield, it and Gonti's Aether Heart trigger twice each, causing you to get eight E.
3. Activate Mishra's Warform by paying eight E and exiling it, taking an extra turn after this one.
4. Repeat each turn.