Delina, Wild Mage | Lightning Runner | Harmonic Prodigy

(and one other card)

Declare
Delina and
Lightning Runner as attackers, triggering
Delina twice and
Lightning Runner once.
Resolve a
Delina trigger, creating at least one token copy of
Bristling Hydra that enters the battlefield tapped and attacking.
When the
Bristling Hydra token(s) enter the battlefield, they trigger, causing you to get at least ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) .
Repeat from step 2 for the remaining
Delina trigger.
Resolve the
Lightning Runner trigger, causing you to get ({E} magic symbol) ({E} magic symbol) and pay eight ({E} magic symbol) to untap all creatures you control and to get an additional combat phase after this one.
At the end of your combat phase, each creature token created by
Delina triggers, exiling themselves.
Repeat each combat phase.
Once you have infinite ({E} magic symbol) , you may target any other creature(s) you control.