Muldrotha, the Gravetide, Wormfang Manta, Torpor Orb, and Phyrexian Altar

Prerequisites

• Muldrotha, the Gravetide on the battlefield
• Wormfang Manta on the battlefield
• Torpor Orb on the battlefield
• Phyrexian Altar on the battlefield
• 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 Torpor Orb
5. Repeat each turn

Results

• Infinite turns