Wormfang Manta, Conduit of Worlds, Tocatli Honor Guard, and Ashnod's Altar

Prerequisites

• Wormfang Manta on the battlefield
• Conduit of Worlds on the battlefield
• Tocatli Honor Guard on the battlefield
• Ashnod's Altar on the battlefield
• You have not cast a spell this turn
• each turn available

Steps

1. Activate Ashnod's Altar by sacrificing Wormfang Manta, adding
2. Wormfang Manta dies, triggering its second ability, causing you to take an extra turn after this one
3. Activate Conduit of Worlds by tapping it, allowing you to cast Wormfang Manta from your graveyard this turn
4. Cast Wormfang Manta by paying
5. Wormfang Manta enters the batltefield, but its first ability does not trigger due to Tocatli Honor Guard
6. Repeat each turn

Results

• Infinite turns
• You cannot cast spells