Guild Artisan, Time Sieve, and Academy Manufactor

Prerequisites

• Guild Artisan on the battlefield
• Time Sieve on the battlefield
• Academy Manufactor on the battlefield
• Your commander is on the battlefield and does not have summoning sickness
• Opponents cannot block and kill your commander

Steps

1. Declare your commander as an attacker, attacking the opponent that has the highest life total or that is tied for the highest life total
2. Your commander triggers, creating two Food, two Clue, and two Treasure artifact tokens
3. Activate Time Sieve by tapping it and sacrificing five artifacts, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns