How can you create a combo with Scaretiller, Retreat to Coralhelm, Obscura Storefront?
user
[START OF COMBO]This combo can be formed with Scaretiller, Retreat to Coralhelm, Obscura Storefront

Color identity: U
Mana cost: 
Steps:
  1. Play Obscura Storefront.
  2. Obscura Storefront enters the battlefield, triggering itself and Retreat to Coralhelm.
  3. Resolve the Obscura Storefront trigger, causing you to sacrifice it, then search your library for a basic Plains, Swamp 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 Obscura Storefront from your graveyard to the battlefield tapped.
  6. Obscura Storefront enters the battlefield, triggering itself and Retreat to Coralhelm.
  7. Resolve the Retreat to Coralhelm trigger, untapping Scaretiller.
  8. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Near-infinite landfall triggers
  - Near-infinite lifegain
  - Near-infinite lifegain triggers
  - Put all basic Swamps, Islands, and Plains from your library onto the battlefield tapped[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Scaretiller must be on the battlefield
  - Retreat to Coralhelm must be on the battlefield
  - Obscura Storefront must be in your hand
  - Scaretiller is untapped.
  - You have a basic Island, Plains, or Swamp in library.
[END OF COMBO PREREQUISITES]
assistant