Isshin, Two Heavens as One + Lightning Runner + Delina, Wild Mage + Aethertorch Renegade
Isshin, Two Heavens as One
Lightning Runner
Delina, Wild Mage
Aethertorch Renegade
Infinite combat phasesInfinite copies of creatures you controlInfinite creature tokensInfinite energy countersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite untap of creatures you control
How it works
Declare Delina and Lightning Runner as attackers, triggering their abilities twice each.
Resolve a Delina trigger, creating at least one token copy of Aethertorch Renegade that enters the battlefield tapped and attacking.
The Aethertorch Renegade token(s) enters the battlefield, causing you to get at least EEEE.
Resolve the second Delina trigger, creating at least one token copy of any creature you control that enters the battlefield tapped and attacking.
Resolve the first Lightning Runner trigger, causing you to get EE and choosing not to pay.
Resolve the second Lightning Runner trigger, causing you to get EE and pay eight E to untap all creatures you control and to get an additional combat phase after this one.
At the end of your combat phase, each creature token created by Delina triggers, exiling themselves.