Zimone, Quandrix Prodigy | Retreat to Coralhelm | Nissa, Resurgent Animist

(and one other card)

Activate
Zimone's first ability by paying ({1} magic symbol) and tapping it, putting
Simic Growth Chamber from your hand onto the battlefield.
When
Simic Growth Chamber enters the battlefield, it,
Retreat to Coralhelm and
Nissa trigger.
Resolve the
Nissa trigger, adding ({1} magic symbol) .
Resolve the
Simic Growth Chamber trigger from step 2, returning it from the battlefield to your hand.
Resolve the
Retreat to Coralhelm trigger, untapping
Zimone.
Repeat.