Muldrotha, the Gravetide, Eternal Witness, Ashnod's Altar, and Temporal Manipulation

Prerequisites

• Muldrotha, the Gravetide on the battlefield
• Eternal Witness in the graveyard
• Ashnod's Altar on the battlefield
• Temporal Manipulation in the graveyard
• You have not cast a creature spell using Muldrotha this turn
• each turn available

Steps

1. Cast Eternal Witness from your graveyard by paying
2. Eternal Witness enters the battlefield, returning Temporal Manipulation from your graveyard to your hand
3. Activate Ashnod's Altar by sacrificing Eternal Witness, adding
4. Cast Temporal Manipulation by paying , causing you to take an extra turn after this one
5. Repeat each turn

Results

• Infinite turns