Wormfang Manta, Muldrotha, the Gravetide, Tocatli Honor Guard, and Phyrexian Altar

Prerequisites

• Wormfang Manta on the battlefield
• Muldrotha, the Gravetide on the battlefield
• Tocatli Honor Guard on the battlefield
• Phyrexian Altar on the battlefield
• You have not cast a creature spell using Muldrotha this turn
• each turn available

Steps

1. Activate Phyrexian Altar by sacrificing Wormfang Manta, adding
2. When Wormfang Manta dies, its second ability triggers, causing you to take an extra turn after this one
3. Cast Wormfang Manta by paying
4. Wormfang Manta's first ability does not trigger when it enters the battlefield due to Tocatli Honor Guard
5. Repeat each turn

Results

• Infinite turns