Time Sieve, Myr Battlesphere, and Terror of Towashi

Prerequisites

• Time Sieve on the battlefield
• Myr Battlesphere on the battlefield
• Terror of Towashi on the battlefield
• Terror of Towashi does not have summoning sickness and cannot be blocked and killed by an opponent
• each turn available

Steps

1. Declare Terror of Towashi as an attacker
2. Terror of Towashi triggers, causing you to pay to return Myr Battlesphere from your graveyard to the battlefield
3. When Myr Battlesphere enters the battlefield, it triggers, creating four 1/1 Myr artifact creature tokens
4. Activate Time Sieve by tapping it, sacrificing Myr Battlesphere and sacrificing the four Myr tokens, causing you to take an extra turn after this one
5. Repeat each turn

Results

• Infinite turns