Abuelo, Ancestral Echo, Wormfang Manta, and Torpor Orb

Prerequisites

• Abuelo, Ancestral Echo on the battlefield
• Wormfang Manta on the battlefield
• Torpor Orb on the battlefield
• each turn available

Steps

1. Activate Abuelo by paying , exiling Wormfang Manta
2. When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one
3. At the beginning of your end step, Abuelo triggers, returning Wormfang Manta to the battlefield from exile
4. Wormfang Manta's first ability does not trigger when it enters the battlefield due to Torpor Orb
5. Repeat each turn

Results

• Infinite turns