Muldrotha, the Gravetide, Mirror of Fate, and Karn's Temporal Sundering

Prerequisites

• Muldrotha, the Gravetide on the battlefield
• Mirror of Fate on the battlefield
• Karn's Temporal Sundering in hand
• each turn available

Steps

1. Cast Karn's Temporal Sundering by paying , taking an extra turn after this one
2. Activate Mirror of Fate by tapping and sacrificing it, choosing Karn's Temporal Sundering from exile and putting it on the top of your library
3. Cast Mirror of Fate from your graveyard by paying
4. Move to your next turn
5. Repeat

Results

• Infinite turns