Conjurer's Closet + Eternal Witness + Time Stretch

3-card combo · GU

Verdict

Yes — this 3-card loop generates infinite turns by blinking Eternal Witness at end step to rebuy Time Stretch every single turn.

Cards required: 3
Cheapest stack total: $6.85
Color identity: GU
Popularity: 65 decks
Format: Commander

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Conjurer's Closet triggers at the beginning of each end step, which means casting Time Stretch for 8UU kicks off a self-sustaining chain: Eternal Witness returns Time Stretch from the graveyard, and the extra turn restarts the loop indefinitely. The combo lives in Simic — Riku of Two Reflections, Kinnan, Bonder Prodigy, or any green-blue value commander that floods the board with ETB payoffs gets the most out of infinite enters and leaves triggers on top of the lock.

Recipe

How it works

Prerequisites

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Steps

Cast Time Stretch by paying , taking an extra turn after this one.
At the beginning of your end step, Conjurer's Closet triggers, blinking Eternal Witness.
Eternal Witness enters the battlefield, returning Time Stretch from your graveyard to your hand.
Repeat.

Result

Infinite ETB; Infinite LTB; Infinite turns; Lock

Variations

Cheaper, tighter, alternate lines

Conjurer's Closet is the bottleneck; Erratic Portal or Temur Sabertooth can substitute as the blink engine, though Sabertooth requires green mana each iteration and Portal requires colorless plus returning the card to hand rather than triggering ETB recursion cleanly. Time Warp or Temporal Manipulation slot in for Time Stretch at half the mana cost and are strictly better here — 10 mana to start the loop is steep, and cutting to 5 means the combo assembles two turns earlier.