Wormfang Manta, Aminatou, the Fateshifter, The Chain Veil, and Karn, Argent Defender

Prerequisites

• Wormfang Manta on the battlefield
• Aminatou, the Fateshifter on the battlefield
• The Chain Veil on the battlefield
• Karn, Argent Defender on the battlefield

Steps

1. Activate Aminatou's first ability by putting a loyalty counter on it, causing you to loot
2. Activate Aminatou's second ability by removing a loyalty counter from it, blinking Wormfang Manta
3. When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one
4. Wormfang Manta entering does not cause its abillity to trigger due to Karn
5. Repeat each turn

Results

• Infinite turns
• Lock