Requires

Zimone, Quandrix Prodigy must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Nissa, Resurgent Animist must be on the battlefield. Guildless Commons must be in hand. Zimone does not have summoning sickness. Mana needed:

Steps

1. Activate Zimone's first ability by paying and tapping it, putting Guildless Commons from your hand onto the battlefield.
2. Guildless Commons enters the battlefield, triggering itself, Nissa and Retreat to Coralhelm.
3. Resolve the Nissa trigger, adding .
4. Resolve the Guildless Commons trigger, returning itself from the battlefield to your hand.
5. Resolve the Retreat to Coralhelm trigger, untapping Zimone.
6. Repeat.

Results