Retreat to Coralhelm, Scaled Herbalist, and Golgari Rot Farm

Prerequisites

• Retreat to Coralhelm on the battlefield
• Scaled Herbalist on the battlefield
• Golgari Rot Farm in hand
• Scaled Herbalist does not have summoning sickness

Steps

1. Activate Scaled Herbalist by tapping it, putting Golgari Rot Farm from your hand onto the battlefield
2. Golgari Rot Farm enters the battlefield, triggering itself and Retreat to Coralhelm
3. Resolve the Golgari Rot Farm trigger, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Scaled Herbalist
5. Repeat

Results

• Infinite landfall triggers