Retreat to Coralhelm + Riveteers Overlook + Scaretiller

U identity

Commander legal

The 3 combo pieces

• Retreat to Coralhelm
• Riveteers Overlook
• Scaretiller

What must be in place

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

How to execute it

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

What the combo produces

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