Medomai the Ageless + Idris, Soul of the TARDIS + Sword of Truth and Justice + Thran Forge

Prerequisites

• An opponent cannot block creatures you control.

Steps

1. 1Deal combat damage to an opponent using Medomai the Ageless.
2. 2Medomai the Ageless triggers, causing you to take an extra turn after this one.
3. 3Activate Thran Forge by paying , causing Medomai the Ageless to become an artifact.
4. 4Cast Idris by paying .
5. 5When Idris enters the battlefield, it triggers, exiling Medomai the Ageless until Idris leaves the battlefield.
6. 6Activate Sword of Truth and Justice's equip ability by paying , attaching it to Idris.
7. 7Move to your extra turn.
8. 8At the beginning of your upkeep, Idris's vanishing ability triggers, removing a time counter from it.
9. 9Deal combat damage to an opponent using Idris.
10. 10Idris and Sword of Truth and Justice trigger.
11. 11Resolve the Idris trigger, causing you to take an extra turn after this one.
12. 12Resolve the Sword of Truth and Justice trigger, putting a +1/+1 counter on a creature you control, then putting a time counter on Idris.
13. 13Repeat from step 7.

Effects

• Infinite turns
• Lock