Wormfang Manta, Torpor Orb, and Mistmeadow Witch

Prerequisites

• Wormfang Manta on the battlefield
• Torpor Orb on the battlefield
• Mistmeadow Witch on the battlefield
• each turn available

Steps

1. Activate Mistmeadow Witch targeting Wormfang Manta
2. On LTB Wormfang Manta triggers, giving you an extra turn
3. On ETB Torpor Orb prevents Wormfang Manta's trigger, so you do not skip your next turn
4. Take your extra turn

Results

• Infinite turns