You have at least ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) , plus an additional ({E} magic symbol) if you control no other creatures.
Notable Prerequisites
An opponent cannot block and kill
Lightning Runner.
Steps
At the beginning of your combat phase,
Saheeli triggers, causing you to pay ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) to create a token copy of
Aetherwind Basker with haste.
When the
Aetherwind Basker token enters the battlefield, it triggers, causing you to get ({E} magic symbol) for each creature you control.
Declare
Lightning Runner and each
Aetherwind Basker token you control as attackers, triggering their abilities.
Resolve all
Aetherwind Basker triggers, causing you to get ({E} magic symbol) for each creature you control for each trigger.
Resolve the
Lightning Runner trigger, causing you to get ({E} magic symbol) ({E} magic symbol) and then pay eight ({E} magic symbol) to untap all creatures you control and to get an additional combat phase after this one.