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 ({G} magic symbol) .
Activate Emiel by paying ({3} magic symbol) , blinking Sage of Shaila's Claim.
Sage of Shaila's Claim enters the battlefield, causing you to get ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) .
Repeat from step 3 one additional time.
Resolve the Lightning Runner ability from step 1, causing you to get ({E} magic symbol) ({E} magic symbol) , then pay eight ({E} magic symbol) to untap all creatures you control, and to get an additional combat phase after this one.