Progenitor Mimic + Time Warp + Eternal Witness

3-card combo · GU

Verdict

Yes — this 3-card loop takes infinite turns as long as the mana to recast Time Warp is available each upkeep.

Cards required: 3
Cheapest stack total: $21.07
Color identity: GU
Popularity: 227 decks
Format: Commander

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Progenitor Mimic copies Eternal Witness and creates a new token at the start of each upkeep; every token enters and returns Time Warp from the graveyard to hand, funding the next extra turn. The loop is clean in Simic — the same shell that runs Wilderness Reclamation, Kodama's Reach, and creature-based ramp can reliably produce the five mana Time Warp demands every iteration.

Recipe

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 Time Warp 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 Time Warp from your graveyard to your hand.
Repeat.

Result

Infinite turns; Lock

Variations

Cheaper, tighter, alternate lines

Nexus of Fate is a functionally tighter substitute for Time Warp — it shuffles itself back into the library rather than hitting the graveyard, which makes Eternal Witness's trigger redundant; stick with Time Warp or Temporal Manipulation here. Swapping in Archaeomancer for Eternal Witness keeps the loop intact if the Witness is removed, though Archaeomancer only retrieves instants and sorceries so the recursion piece is narrower.