This clever loop relies on rebuying your extra turn spell while continually generating value off your other permanents. By casting Capture of Jingzhou, you secure an extra turn, which then gets pulled straight out of your graveyard and back to your hand whenever Damage Control Crew enters the battlefield. To keep the engine running, Dour Port-Mage steps in with its activated ability to bounce Damage Control Crew back to your hand, allowing you to replay it on your subsequent turns. Best of all, Dour Port-Mage's passive triggered ability rewards you for this constant bouncing by drawing you a card every time Damage Control Crew leaves the battlefield without dying, ultimately locking down the game with infinite turns and endless card draw.