Mishra, Eminent One | Gonti's Aether Heart | Strionic Resonator

Cards

At the beginning of your combat phase,
Mishra triggers.
Holding priority, activate
Strionic Resonator by paying ({2} magic symbol) and tapping it, copying
Mishra's trigger.
Resolve the first
Mishra trigger, creating a 4/4 artifact creature token copy of
Gonti's Aether Heart named
Mishra's Warform.
When
Mishra's Warform enters the battlefield, it and
Gonti's Aether Heart trigger, causing you to get four energy counters.
Resolve the second
Mishra trigger from step 1, creating a 4/4 artifact creature token copy of
Gonti's Aether Heart named
Mishra's Warform.
Put either
Mishra's Warform into your graveyard due to the legend rule.
When the second
Mishra's Warform enters the battlefield, both
Mishra's Warforms and
Gonti's Aether Heart trigger, causing you to get six energy counters.
Activate the remaining
Mishra's Warform by paying eight energy counters and exiling it, causing you to take an extra turn after this one.
Repeat each turn.