Thassa, Deep-Dwelling + Eternal Witness + Walk the Aeons

3-card combo · GU

Verdict

Yes — this 3-card loop generates infinite turns in Simic by recurring Walk the Aeons through Thassa's end-step blink on Eternal Witness.

Cards required: 3
Cheapest stack total: $36.29
Color identity: GU
Popularity: 96 decks
Format: Commander

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Thassa, Deep-Dwelling blinks Eternal Witness at end of turn, which returns Walk the Aeons from the graveyard to hand in time to cast it again next turn. The loop costs 4UU per iteration with no additional setup — any Simic commander that runs Thassa as a value engine, such as Aesi, Tyrant of Gyre Strait or Tatyova, Benthic Druid, slots this in without restructuring the deck.

Recipe

How it works

Prerequisites

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Steps

Cast Walk the Aeons by paying , getting an extra turn after this one.
At the beginning of your end step, Thassa triggers, blinking Eternal Witness.
Eternal Witness enters the battlefield, returning Walk the Aeons from your graveyard to your hand.
Repeat.

Result

Infinite turns; Lock

Variations

Cheaper, tighter, alternate lines

Conjurer's Closet replaces Thassa as the blink engine at the cost of losing the 2U body and requiring an artifact slot instead. Regrowth or Recollect can sub for Eternal Witness in budget lists, but they require a separate blink target, adding a fourth card to the line. Tutors like Worldly Tutor or Green Sun's Zenith fetch Eternal Witness reliably, making the three-piece assembly faster than it looks.