River Song + Transplant Theorist + Capture of Jingzhou

River Song

Transplant Theorist

Capture of Jingzhou

How it works

1. Cast Capture of Jingzhou by paying 3, causing you to take an extra turn after this one.
2. Activate Transplant Theorist by paying 2, causing you to put Capture of Jingzhou on the bottom of your library from your graveyard.
3. Move to your next turn, drawing Capture of Jingzhou from the bottom of your library due to River Song during your draw step.
4. Repeat.

This clever loop twists time and library mechanics into an endless succession of extra turns. Once you cast Capture of Jingzhou, Transplant Theorist steps in to recycle the sorcery straight to your library for just two mana. Because River Song reverses your draw zone, you bypass the normal top-deck limitation to pluck Capture of Jingzhou right back off the bottom during your draw step, ready to cast again.