Scaretiller + Retreat to Coralhelm + Maestros Theater

Prerequisites

• Scaretiller is untapped.
• You have a basic Island, Mountain, or Swamp in library.

Steps

1. 1Play Maestros Theater.
2. 2Maestros Theater enters the battlefield, triggering itself and Retreat to Coralhelm.
3. 3Resolve the Maestros Theater trigger, causing you to sacrifice it, then search your library for a basic Mountain, Swamp or Island card, put it onto the battlefield tapped, and gain 1 life.
4. 4The basic land enters the battlefield, triggering Retreat to Coralhelm, tapping Scaretiller.
5. 5Scaretiller triggers, returning Maestros Theater from your graveyard to the battlefield tapped.
6. 6Maestros Theater enters the battlefield, triggering itself and Retreat to Coralhelm.
7. 7Resolve the Retreat to Coralhelm trigger, untapping Scaretiller.
8. 8Repeat from step 3.

Effects

• Near-infinite landfall triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Put all basic Swamps, Islands, and Mountains from your library onto the battlefield tapped