Roon of the Hidden Realm + Eternal Witness + Temporal Manipulation

3-card combo · GWU

Verdict

Yes — this 3-card loop takes infinite turns by rebasing Temporal Manipulation into hand every end step via Eternal Witness.

Cards required

Cheapest stack total

$22.47

Color identity

GWU

Popularity

56 decks

Format

Commander

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Roon of the Hidden Realm blinks Eternal Witness at end of turn, which returns Temporal Manipulation from the graveyard to hand — cast it again next turn, repeat indefinitely. The loop costs 5 mana per turn cycle to recycle the extra-turn spell, so the shell needs enough acceleration to hit that threshold reliably by the time Roon is active. Bant flicker decks running Ephemerate, Conjurer's Closet, or Brago, King Eternal already have the infrastructure to abuse Eternal Witness repeatedly.

How it works

Prerequisites

Roon does not have summoning sickness.

Steps

Cast Temporal Manipulation by paying , causing you to take an extra turn after this one.
Activate Roon by paying and tapping it, exiling Eternal Witness until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Eternal Witness from exile to the battlefield.
Eternal Witness enters the battlefield, putting Temporal Manipulation into your hand from your graveyard.
Repeat each turn.

Result

Infinite turns; Lock

Cheaper, tighter, alternate lines

Time Warp is a direct 1-for-1 substitute for Temporal Manipulation at the same 3UU cost. Strionic Resonator can copy Roon's triggered ability to get double value from Eternal Witness, though that's a slower line. Any extra-turn spell in Bant — Walk the Aeons, Nexus of Fate — plugs into the same socket since Eternal Witness just needs a sorcery in the graveyard to recur.

Roon of the Hidden Realm + Eternal Witness + Temporal Manipulation

How it works

Cheaper, tighter, alternate lines

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