Archelos, Lagoon Mystic, Zimone, Quandrix Prodigy, Retreat to Coralhelm, and Gruul Turf

Prerequisites

• Archelos, Lagoon Mystic on the battlefield
• Zimone, Quandrix Prodigy on the battlefield
• Retreat to Coralhelm on the battlefield
• Gruul Turf in hand
• Zimone does not have summoning sickness
• Archelos is untapped
• available

Steps

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

Results

• Infinite green mana
• Infinite landfall triggers
• Infinite red mana