Rukarumel, Biologist, Time Sieve, Myr Battlesphere, and Lin Sivvi, Defiant Hero

Prerequisites

• Rukarumel, Biologist on the battlefield
• Time Sieve on the battlefield
• Myr Battlesphere in the library
• Lin Sivvi, Defiant Hero on the battlefield
• Lin Sivvi does not have summoning sickness
• "Rebel" chosen with Rukarumel
• each turn available

Steps

1. Activate Lin Sivvi's first ability by paying and tapping it, causing you to search your library for Myr Battlesphere and put it onto the battlefield
2. When Myr Battlesphere enters the battlefield, it triggers, creating four 1/1 Myr artifact creature tokens
3. Activate Time Sieve by tapping it, sacrificing Myr Battlesphere and the four Myr tokens, causing you to take an extra turn after this one
4. Activate Lin Sivvi's second ability by paying , putting Myr Battlesphere on the bottom of your library from your graveyard
5. Repeat each turn

Results

• Infinite turns