Time Sieve, Myr Battlesphere, and Halvar, God of Battle // Sword of the Realms

Prerequisites

• Time Sieve on the battlefield
• Myr Battlesphere in hand
• Halvar, God of Battle // Sword of the Realms on the battlefield
• each turn available

Steps

1. Cast Myr Battlesphere by paying
2. Myr Battlesphere enters the battlefield, creating four 1/1 Myr creature tokens
3. Activate Sword of the Realms' equip ability by paying , attaching it to Myr Battlesphere
4. Activate Time Sieve by tapping it, sacrificing Myr Battlesphere and sacrificing the four Myr tokens
5. When Myr Battlesphere dies, Sword of the Realms triggers, returning Myr Battlesphere to your hand from your graveyard
6. Resolve the Time Sieve ability, causing you to take an extra turn after this one
7. Repeat each turn

Results

• Infinite turns