Double Vision + Venser, Shaper Savant + Naban, Dean of Iteration + Walk the Aeons

Double Vision

Venser, Shaper Savant

Naban, Dean of Iteration

Walk the Aeons

How it works

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

This brilliant loop gives you infinite turns by endlessly recycling your extra-turn spell right back to your hand. When you cast Walk the Aeons, Double Vision steps in to copy it, ensuring you get the extra turn regardless of what happens to the original. Meanwhile, flashing in Venser, Shaper Savant is amplified by Naban, Dean of Iteration, whose wizard-boosting static ability causes Venser's enter-the-battlefield trigger to fire twice instead of once. This allows Venser to scoop both the original Walk the Aeons straight off the stack and himself back to your hand, setting up the exact same sequence on your next extra turn.