Dour Port-Mage + Capture of Jingzhou + Eternal Witness

3-card combo · GU

Verdict

Yes — this 3-card loop locks the table into infinite turns as long as the mana holds each iteration.

Cards required: 3
Cheapest stack total: $200.67
Color identity: GU
Popularity: 55 decks
Format: Commander

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Capture of Jingzhou buys the extra turn; Eternal Witness retrieves it from the graveyard on entry, and Dour Port-Mage bounces Witness back to hand for 1U while drawing a card to keep the loop fueled. The combo lives in Simic extra-turns shells — Rashmi, Eternities Crafter or Kiora, the Crashing Wave commanders that already run the full suite of Time Warp effects.

Recipe

How it works

Prerequisites

available plus enough mana to cast Capture of Jingzhou and Eternal Witness each turn.

Steps

Cast Capture of Jingzhou by paying its mana cost, causing you to take an extra turn after this one.
Cast Eternal Witness by paying its mana cost.
When Eternal Witness enters the battlefield, it triggers, returning Capture of Jingzhou from your graveyard to your hand.
Move to your next turn.
Activate Dour Port-Mage by paying and tapping it, returning Eternal Witness from the battlefield to your hand.
Dour Port-Mage triggers, causing you to draw a card.
Repeat.

Result

Infinite turns; Lock

Variations

Cheaper, tighter, alternate lines

Time Warp and Temporal Manipulation are direct replacements for Capture of Jingzhou if a cheaper five-mana stand-in isn't available — the loop works with any sorcery that grants an extra turn and ends up in the graveyard. Recursion redundancy is the real gap: if Eternal Witness is removed before the trigger resolves, the chain collapses, so Regrowth or Nostalgic Dreams in hand acts as insurance.