Kenrith, the Returned King, Archaeomancer, Time Warp, and Ashnod's Altar

Prerequisites

• Kenrith, the Returned King on the battlefield
• Archaeomancer on the battlefield
• Time Warp in the graveyard
• Ashnod's Altar on the battlefield
• each turn available

Steps

1. Activate Ashnod's Altar by sacrificing Archaeomancer, adding
2. Activate Kenrith's last ability by paying , returning Archaeomancer from your graveyard to the battlefield
3. Archaeomancer enters the battlefield, returning Time Warp from your graveyard to your hand
4. Cast Time Warp by paying , causing you to take an extra turn after this one
5. Repeat

Results

• Infinite turns