Myr Welder, and Magistrate's Scepter

Prerequisites

• Myr Welder on the battlefield
• Magistrate's Scepter in exile

Steps

1. Activate Myr Welder using a Spacecraft's station ability by tapping a creature you control, putting a number of charge counters on Myr Welder equal to the creature's power
2. If necessary, repeat step 1 until Myr Welder has three or more charge counters on it
3. Activate Myr Welder using 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