Progenitor Mimic + Skullwinder + Capture of Jingzhou

Progenitor Mimic

Skullwinder

Capture of Jingzhou

How it works

1. Cast Capture of Jingzhou by paying its mana cost, taking an extra turn after this one.
2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Skullwinder.
3. When the token Skullwinder enters the battlefield, it triggers itself, returning Capture of Jingzhou from your graveyard to your hand.
4. Repeat.

This clever loop gives you infinite turns by endlessly recycling a single extra-turn spell right back into your hand. You start by casting Capture of Jingzhou to buy yourself another turn, letting you untap and head straight into your next upkeep. That is where Progenitor Mimic shines, exploiting its upkeep trigger to spawn a fresh token copy of Skullwinder every single turn cycle. As that token enters the battlefield, its ability lets you pluck Capture of Jingzhou straight out of your graveyard and back into your hand, ready to be cast again while the opponent's choice from Skullwinder's recursion is easily managed.