Mimic Vat, Coretapper, and Magistrate's Scepter

Prerequisites

• Mimic Vat on the battlefield
• Coretapper in exile
• Magistrate's Scepter on the battlefield
• each turn available

Steps

1. Activate Mimic Vat by paying and tapping it, creating a token copy of Coretapper with haste that will be exiled at the beginning of the next end step
2. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter
3. Activate Coretapper's second ability by sacrificing it, putting two charge counters on Magistrate's Scepter
4. Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one
5. At the beginning of the end step, the delayed ability from Mimic Vat triggers, failing to exile anything
6. Repeat each turn

Results

• Infinite turns