Prerequisites
- Medomai the Ageless on the battlefield
- Idris, Soul of the TARDIS in hand
- Karn's Bastion on the battlefield
- Encroaching Mycosynth on the battlefield
- An opponent cannot block creatures you control
- available the first turn, with each extra turn available
Steps
- 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 5
Results
Required Cards 4
Medomai the Ageless
Legendary Creature — Sphinx
Idris, Soul of the TARDIS
Legendary Creature — Human Incarnation
Encroaching Mycosynth
Artifact