Retreat to Coralhelm + Golgari Rot Farm + Llanowar Scout

Retreat to Coralhelm

Golgari Rot Farm

Llanowar Scout

How it works

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

This clever loop turns a simple bounce-land into an infinite engine by leveraging Llanowar Scout's ability to constantly drop Golgari Rot Farm back onto the battlefield. Every time the land arrives, Retreat to Coralhelm triggers its landfall ability to untap the Scout, setting up the loop to repeat indefinitely. Because Golgari Rot Farm automatically bounces itself back to your hand upon entry, you have an endless supply of land drops to fuel your triggers.