How can you create a combo with Shirei, Shizo's Caretaker, Coretapper, Magistrate's Scepter?
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[START OF COMBO]This combo can be formed with Shirei, Shizo's Caretaker, Coretapper, Magistrate's Scepter

Color identity: B
Mana cost: 
Steps:
  1. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter.
  2. Activate Coretapper's second ability by sacrificing it.
  3. When Coretapper dies, Shirei triggers, creating a delayed triggered ability.
  4. Resolve Coretapper's ability, putting two charge counters on Magistrate's Scepter.
  5. Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one.
  6. At the beginning of your end step, Shirei's delayed ability from step 3 triggers, returning Coretapper from your graveyard to the battlefield.
  7. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Coretapper does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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