Muldrotha, the Gravetide, Time Sieve, and Myr Battlesphere

Prerequisites

• Muldrotha, the Gravetide on the battlefield
• Time Sieve on the battlefield
• Myr Battlesphere in the graveyard
• You have not cast an artifact and/or a creature spell using Muldrotha this turn
• each turn available

Steps

1. Cast Myr Battlesphere from your graveyard by paying
2. Myr Battlesphere enters the battlefield, creating four 1/1 Myr creature tokens
3. 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
4. Repeat each turn

Results

• Infinite turns