Coretapper, Magistrate's Scepter, Dakkon, Shadow Slayer, and Brago, King Eternal

Prerequisites

• Coretapper on the battlefield
• Magistrate's Scepter on the battlefield
• Dakkon, Shadow Slayer on the battlefield
• Brago, King Eternal on the battlefield
• Coretapper does not have summoning sickness
• You control at least seven lands
• Brago does not have summoning sickness and cannot be blocked by an opponent

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, taking an extra turn after this one
4. Deal combat damage to an opponent using Brago
5. Brago triggers, blinking Dakkon
6. Activate Dakkon's third loyalty ability by removing six loyalty counters from it, returning Coretapper from your graveyard to the battlefield
7. Repeat each turn

Results

• Infinite turns