Rionya, Fire Dancer + Lightning Runner

Rionya, Fire Dancer

Lightning Runner

How it works

1. At the beginning of your combat phase, Rionya triggers, creating at least four token copies of Lightning Runner with haste.
2. Each Lightning Runner token enters the battlefield, triggering their abilities.
3. Resolve the first Lightning Runner trigger, adding EE and choosing not to pay.
4. Repeat step 3 until there is only one LIghtning Runner trigger remaining.
5. Resolve the final Lightning Runner trigger, adding EE and choosing to pay eight E to untap all creatures you control and get an additional combat phase after this one.
6. Repeat each combat phase.