Urtet, Remnant of Memnarch, Magistrate's Scepter, Coretapper, and Myr Galvanizer

Prerequisites

• Urtet, Remnant of Memnarch on the battlefield
• Magistrate's Scepter on the battlefield
• Coretapper on the battlefield
• Myr Galvanizer on the battlefield
• Coretapper and Myr Galvanizer do 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 Myr Galvanizer by paying and tapping it, untapping each other Myr you control
3. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter
4. At the beginning of combat on your turn, Urtet triggers, untapping each Myr you control
5. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter
6. Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, causing you to take an extra turn after this one
7. Repeat each turn

Results

• Infinite turns