Ghostly Flicker + Mystic Sanctuary + Walk the Aeons + Eternal Witness

4-card combo · GU

Verdict

Yes — this 4-card loop generates infinite turns in a Simic shell that can assemble all pieces through normal play.

Cards required

Cheapest stack total

$14.92

Color identity

Popularity

469 decks

Format

Commander

Buy required cards on TCGplayer

Walk the Aeons takes the extra turn; Ghostly Flicker blinks Mystic Sanctuary and Eternal Witness on the same cast, letting Eternal Witness recover Ghostly Flicker and Mystic Sanctuary put Walk the Aeons back on top of the library. The engine costs 3 blue and 2 green per loop iteration and requires four Islands in play — fetchlands and dual lands with the Island subtype like Breeding Pool and Tropical Island count toward that threshold.

How it works

Prerequisites

You control at least four Islands.

Steps

Activate Mystic Sanctuary by tapping it, adding .
Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.
Cast Ghostly Flicker by paying , blinking Mystic Sanctuary and Eternal Witness.
When Eternal Witness and Mystic Sanctuary enter the battlefield, they trigger.
Resolve the Eternal Witness trigger, returning Ghostly Flicker from your graveyard to your hand.
Resolve the Mystic Sanctuary trigger, putting Walk the Aeons from your graveyard onto the top of your library.
Move to your next turn, drawing Walk the Aeons during your draw step.
Repeat.

Result

Infinite turns; Skip your draw steps; Lock

Cheaper, tighter, alternate lines

Ghostly Flicker can be swapped for Displace or Illusionist's Stratagem if the deck already runs those blink effects, though Illusionist's Stratagem costs one more mana per loop. Any Simic commander with access to tutors like Mystical Tutor or Bring to Light can assemble this consistently; Kruphix, God of Horizons and Rashmi, Eternities Crafter are the natural homes given their incentive to stack library manipulation.