God-Eternal Kefnet + Isochron Scepter + Brainstorm + Capture of Jingzhou

God-Eternal Kefnet

Isochron Scepter

Brainstorm

Capture of Jingzhou

How it works

1. During the end step before your turn, activate Isochron Scepter by paying 2 and tapping it, casting a copy of Brainstorm without paying its mana cost.
2. Resolve Brainstorm, causing you to draw three cards and put Capture of Jingzhou and another card on top of your library, ensuring Capture of Jingzhou is the topmost card.
3. Move to your turn, drawing and revealing Capture of Jingzhou during your draw step.
4. God-Eternal Kefnet's first ability triggers, causing you to pay 1 to cast a copy of Capture of Jingzhou.
5. Resolve the copy of Capture of Jingzhou, causing you to take an extra turn after this one.
6. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Brainstorm without paying its mana cost.
7. Repeat from step 2.