Double Vision, Venser, Shaper Savant, Naban, Dean of Iteration, and Time Warp

Prerequisites

• Double Vision on the battlefield
• Venser, Shaper Savant in hand
• Naban, Dean of Iteration on the battlefield
• Time Warp in hand
• You haven't cast an instant or sorcery spell this turn
• each turn available

Steps

1. Cast Time Warp by paying
2. Double Vision triggers, copying Time Warp
3. Holding priority, cast Venser by paying
4. When Venser enters the battlefield, it triggers twice, returning itself and the original Time Warp to your hand from the battlefield and stack respectively
5. Resolve the copy of Time Warp, causing you to take an extra turn after this one
6. Repeat each turn

Results

• Infinite turns