Progenitor Mimic + Capture of Jingzhou + Eternal Witness

3-card combo · GU

Verdict

Yes — this 3-piece loop locks the table into infinite turns as long as Progenitor Mimic stays on the battlefield as an Eternal Witness copy.

Cards required

Cheapest stack total

$12.61

Color identity

Popularity

45 decks

Format

Commander

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Progenitor Mimic's upkeep trigger creates a token copy of Eternal Witness each turn; that token's ETB immediately returns Capture of Jingzhou to hand, which gets cast to generate another extra turn before the Mimic fires again. The loop demands five mana every turn cycle to recast Capture of Jingzhou, so ramp pieces are non-negotiable to sustain it. Simic shells running Yennett, Cryptic Sovereign or Riku of Two Reflections already want both the clone effect and the extra turn spell, making this a natural fit.

How it works

Prerequisites

Enough mana available to cast the extra turn spell each turn. Progenitor Mimic is a copy of Eternal Witness.

Steps

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

Result

Infinite turns; Lock

Cheaper, tighter, alternate lines

Time Warp and Temporal Manipulation are the direct replacements for Capture of Jingzhou as the five-mana take-an-extra-turn slot — all three are functionally identical here. Any Eternal Witness substitute that returns a card from the graveyard on ETB, such as Timeless Witness or Den Protector, keeps the loop intact if Eternal Witness is removed. The combo wins by decking opponents or landing a payoff during the extra turns — Thassa's Oracle or a lethal creature swing closes it.

Progenitor Mimic + Capture of Jingzhou + Eternal Witness

How it works

Cheaper, tighter, alternate lines

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