Wormfang Manta, Tocatli Honor Guard, and Roon of the Hidden Realm

Prerequisites

• Wormfang Manta on the battlefield
• Tocatli Honor Guard on the battlefield
• Roon of the Hidden Realm on the battlefield
• each turn available

Steps

1. Blink Wormfang Manta using Roon of the Hidden Realm
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