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

Color identity: B
Mana cost: {5}{B}{B} each turn
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. Grim Harvest's Recover ability triggers, causing you to pay {2}{B} to return Grim Harvest from your graveyard to your hand.
  4. Resolve Coretappers 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. Cast Grim Harvest by paying {1}{B}, returning Coretapper from your graveyard to your hand.
  7. Cast Coretapper by paying {2}.
  8. Repeat each turn.[END OF COMBO STEPS]

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

Other prerequisites:
  - Grim Harvest must be in the graveyard
  - Coretapper must be on the battlefield
  - Magistrate's Scepter must be on the battlefield
  - Coretapper does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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