Circle of Dreams Druid does not have summoning sickness.
You control at least two other creatures.
An opponent cannot block and kill
Lightning Runner.
Steps
Declare
Lightning Runner as an attacker, triggering its ability.
Holding priority, activate
Circle of Dreams Druid by tapping it, adding at least six .
Activate
Emiel by paying , blinking
Peema Aether-Seer.
Peema Aether-Seer enters the battlefield, causing you to get at least .
Repeat from step 3 one additional time.
Resolve the
Lightning Runner ability from step 1, causing you to get , then pay eight to untap all creatures you control, and to get an additional combat phase after this one.
Repeat each combat phase.
Results
Infinite combat phases.
Infinite energy counters.
Infinite creature ETB.
Infinite creature LTB.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.