Inspirit, Flagship Vessel, Magistrate's Scepter, and Vedalken Infuser

Prerequisites

• Inspirit, Flagship Vessel on the battlefield
• Magistrate's Scepter on the battlefield
• Vedalken Infuser on the battlefield

Steps

1. At the beginning of your upkeep, Vedalken Infuser triggers, putting a charge counter on Magistrate's Scepter
2. At the beginning of your combat phase, Inspirit triggers, 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. Repeat each turn

Results

• Infinite turns