Progenitor Mimic + Skullwinder + Temporal Manipulation

Progenitor Mimic

Skullwinder

Temporal Manipulation

How it works

1. Cast Temporal Manipulation 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 Temporal Manipulation from your graveyard to your hand.
4. Repeat.

This cunning engine achieves infinite turns by looping **Temporal Manipulation** straight back from your graveyard to your hand, fueled entirely by the enter-the-battlefield trigger of **Skullwinder**. The true magic here relies on **Progenitor Mimic**, which bypasses the usual limits of creature generation by quietly spawning a brand-new token copy of **Skullwinder** at the start of every single upkeep. Because the token is not itself a token when it first materializes, **Progenitor Mimic**'s steady upkeep clause sustains the loop indefinitely, ensuring you can keep casting your extra turns until the game is won.