Magistrate's Scepter, Coretapper, and Contagion Engine

Prerequisites

• Magistrate's Scepter on the battlefield
• Coretapper on the battlefield
• Contagion Engine on the battlefield
• Coretapper does not have summoning sickness
• each turn available

Steps

1. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter
2. Activate Contagion Engine by paying and tapping it, proliferating twice, putting two additional charge counters on Magistrate's Scepter
3. Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one
4. Repeat each turn

Results

• Infinite turns