Medomai the Ageless + Idris, Soul of the TARDIS + Karn's Bastion + Liquimetal Torque
4-card combo · URW
Verdict
Yes — this 4-card loop chains infinite extra turns by cycling Idris, Soul of the TARDIS as both the Medomai the Ageless enabler and the replacement turn-taker.
- Cards required
- 4
- Cheapest stack total
- $2.93
- Color identity
- URW
- Popularity
- 0 decks
- Format
- Commander
Liquimetal Torque turns Medomai the Ageless into an artifact so Idris, Soul of the TARDIS can exile it on entry, freeing Medomai from its own once-per-turn restriction while Idris takes over the extra-turn generation. Karn's Bastion then replaces the time counter Idris loses at each upkeep, keeping vanishing from ending the loop. The combo lives or dies on the unblockable prerequisite — evasion pieces like Aqueous Form, Thassa, God of the Sea, or a Reconnaissance line are non-negotiable infrastructure, not extras.
Recipe
How it works
01
Prerequisites
An opponent cannot block creatures you control.
02
Steps
- Activate Liquimetal Torque's second ability by tapping it, causing Medomai the Ageless to become an artifact until end of turn.
- Deal combat damage to an opponent using Medomai the Ageless.
- Medomai the Ageless triggers, causing you to take an extra turn after this one.
- Cast Idris by paying
. - When Idris enters the battlefield, it triggers, exiling Medomai the Ageless until Idris leaves the battlefield.
- Move to your extra turn.
- At the beginning of your upkeep, Idris's vanishing ability triggers, removing a time counter from it.
- Activate Karn's Bastion's second ability by paying
and tapping it, putting a time counter on Idris. - Deal combat damage to an opponent using Idris.
- Idris triggers, causing you to take an extra turn after this one.
- Repeat from step 6.
03
Result
Infinite turns; Lock
Variations
Cheaper, tighter, alternate lines
Liquimetal Coating fills the Torque slot if the Torque is removed, though it requires a tap and a mana each loop. There is no tighter version of this combo — all four pieces are load-bearing, so redundancy means running tutors for Liquimetal Torque specifically, such as Reshape or Whir of Invention, rather than cutting cards.
Related
Other combos sharing these cards
Jan Jansen, Chaos Crafter + Dross Scorpion + Skullclamp + Liquimetal Torque
Infinite card draw; Infinite draw triggers; Near-infinite death triggers; Near-infinite ETB; Near-infinite LTB
Tekuthal, Inquiry Dominus + Magistrate's Scepter + Lithoform Engine + Karn's Bastion
Infinite turns; Lock
Verified on Commander Spellbook · Combo ID idris-soul-of-the-tardis-karns-bastion-medomai-the-ageless-2
Updated . Data from Commander Spellbook, Scryfall, and EDHREC.