Sharuum the Hegemon, Coretapper, Magistrate's Scepter, and Meneldor, Swift Savior

Prerequisites

• Sharuum the Hegemon on the battlefield
• Coretapper on the battlefield
• Magistrate's Scepter on the battlefield
• Meneldor, Swift Savior on the battlefield

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, putting two charge counters on Magistrate's Scepter
3. 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
4. Deal combat damage to an opponent using Meneldor
5. Meneldor triggers, blinking Sharuum
6. When Sharuum enters the battlefield, it triggers, returning Coretapper from your graveyard to the battlefield
7. Repeat each turn

Results

• Infinite turns