Wormfang Manta, Tocatli Honor Guard, and The Mind Stone

Prerequisites

• Wormfang Manta on the battlefield
• Tocatli Honor Guard on the battlefield
• The Mind Stone on the battlefield or in the graveyard

Steps

1. Blink Wormfang Manta using The Mind Stone
2. Wormfang Manta's first ability won't trigger due to Tocatli Honor Guard
3. Wormfang Manta's second ability triggers, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns
• Lock