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

Color identity: C
Mana cost: {2} each turn
Steps:
  1. Activate Magistrate's Scepter by tapping and removing three charge counters from it, taking an extra turn after this one.
  2. Activate Prototype Portal by paying {2} and tapping it, creating a copy of Coretapper.
  3. Move to your next turn.
  4. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter.
  5. Activate Coretapper's second ability by sacrificing it, putting two charge counters on Magistrate's Scepter.
  6. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Prototype Portal must be on the battlefield
  - Coretapper must be exiled
  - Magistrate's Scepter must be on the battlefield
  - Magistrate's Scepter has at least three charge counters.
[END OF COMBO PREREQUISITES]
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