Double Vision + Venser, Shaper Savant + Naban, Dean of Iteration + Capture of Jingzhou

Double Vision

Venser, Shaper Savant

Naban, Dean of Iteration

Capture of Jingzhou

How it works

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

This loop secures infinite turns by abusing the clever synergy between Double Vision, which automatically copies your initial instant or sorcery each turn, and Capture of Jingzhou, which grants you those extra turns to work with. The real magic happens when you flash in Venser, Shaper Savant: thanks to Naban, Dean of Iteration doubling Wizard-triggered abilities, Venser's entrance triggers twice, allowing you to bounce both the original Capture of Jingzhou off the stack right back to your hand and Venser itself for reuse on subsequent turns.