Medomai the Ageless + Idris, Soul of the TARDIS + Thrummingbird + Biotransference

Medomai the Ageless

Idris, Soul of the TARDIS

Thrummingbird

Biotransference

How it works

1. Deal combat damage to an opponent using Medomai the Ageless.
2. Medomai the Ageless triggers, causing you to take an extra turn after this one.
3. Cast Idris by paying 1.
4. When Idris enters the battlefield, it triggers, exiling Medomai the Ageless until Idris leaves the battlefield.
5. Move to your extra turn.
6. At the beginning of your upkeep, Idris's vanishing ability triggers, removing a time counter from it.
7. Deal combat damage to an opponent using Idris and Thrummingbird.
8. Idris and Thrummingbird trigger.
9. Resolve the Idris trigger, causing you to take an extra turn after this one.
10. Resolve the Thrummingbird trigger, putting a time counter on Idris.
11. Repeat from step 5.