Time Sieve + Mimic Vat + Myr Battlesphere

Prerequisites

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Steps

1. 1Activate Mimic Vat, putting a token copy of Myr Battlesphere onto the battlefield.
2. 2The Myr Battlesphere Token triggers, creating four Myr tokens.
3. 3Activate Time Sieve, sacrificing Myr Battlesphere and the 4 Myr tokens, getting an extra turn.
4. 4Pass the turn.
5. 5Repeat.

Effects

• Infinite turns
• Lock