Zimone, Quandrix Prodigy, Retreat to Coralhelm, Tiller Engine, and Golgari Rot Farm

Prerequisites

• Zimone, Quandrix Prodigy on the battlefield
• Retreat to Coralhelm on the battlefield
• Tiller Engine on the battlefield
• Golgari Rot Farm in hand
• available

Steps

1. Activate Zimone's first ability by paying and tapping it, putting Golgari Rot Farm from your hand onto the battlefield untapped due to When Golgari Rot Farm enters the battlefield, it, Tiller Engine and Retreat to Coralhelm trigger
2. Resolve the Tiller Engine trigger, untapping Golgari Rot Farm Holding priority, activate Golgari Rot Farm by tapping it, adding
3. Resolve the Golgari Rot Farm trigger from step 2, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Zimone
5. Repeat

Results

• Infinite green mana
• Infinite black mana
• Infinite landfall triggers