- Myr Battlesphere in your graveyard.
- Time Sieve and Harnessed Snubhorn on the battlefield.
- Harnessed Snubhorn does not have summoning sickness and cannot be blocked by an opponent.
- Deal combat damage with Harnessed Snubhorn.
- Harnessed Snubhorn triggers, returning Myr Battlesphere from your graveyard to the battlefield.
- Myr Battlesphere enters the battlefield, creating four 1/1 Myr creature tokens.
- 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.
- Repeat each turn.