Dour Port-Mage + Eternal Witness + Capture of Jingzhou

Dour Port-Mage

Eternal Witness

Capture of Jingzhou

How it works

1. Cast Capture of Jingzhou by paying its mana cost, causing you to take an extra turn after this one.
2. Cast Eternal Witness by paying its mana cost.
3. When Eternal Witness enters the battlefield, it triggers, returning Capture of Jingzhou from your graveyard to your hand.
4. Move to your next turn.
5. Activate Dour Port-Mage by paying 1 and tapping it, returning Eternal Witness from the battlefield to your hand.
6. Dour Port-Mage triggers, causing you to draw a card.
7. Repeat.

This crafty sequence achieves infinite turns by recycling Capture of Jingzhou through the recurring enter-the-battlefield trigger of Eternal Witness. While Eternal Witness is pulled back to your hand using Dour Port-Mage's activated ability, Dour Port-Mage’s passive triggered ability also ensures you draw a card each time a creature leaves the battlefield without dying, turning your loop into a continuous card-advantage engine. By recasting Capture of Jingzhou and Eternal Witness turn after turn, you permanently lock down the game and bury your opponents under an unstoppable extra-turn cascade.