Lightning Runner and Stone Idol Generator on the battlefield.
You control at least five additional creatures that do not have summoning sickness.
An opponent cannot block and kill creatures you control.
Steps
Declare Lightning Runner and at least five other creatures as attackers.
Lightning Runner triggers once, and Stone Idol Generator triggers for each attacking creature.
Resolve all Stone Idol Generator triggers, causing you to get that much ({E} magic symbol) .
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.
Repeat.
You may attack with additional creatures to net additional ({E} magic symbol) each loop.