Scaretiller, Retreat to Coralhelm, and Brokers Hideout

Prerequisites

• Scaretiller on the battlefield
• Retreat to Coralhelm on the battlefield
• Brokers Hideout in hand
• Scaretiller is untapped
• You have a basic Island, Forest or Plains in library

Steps

1. Play Brokers Hideout
2. Brokers Hideout enters the battlefield, triggering itself and Retreat to Coralhelm
3. Resolve the Brokers Hideout trigger, causing you to sacrifice it, then search your library for a basic Forest, Plains or Island 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 Brokers Hideout from your graveyard to the battlefield tapped
6. Brokers Hideout enters the battlefield, triggering itself and Retreat to Coralhelm
7. Resolve the Retreat to Coralhelm trigger, untapping Scaretiller
8. Repeat from step 3

Results

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