Cast Capture of Jingzhou by paying its mana cost, causing you to take an extra turn after this one.
Cast Ghostly Flicker by paying 2, blinking Mystic Sanctuary and Ardent Elementalist.
When Ardent Elementalist and Mystic Sanctuary enter the battlefield, they trigger.
Resolve the Ardent Elementalist trigger, returning Ghostly Flicker from your graveyard to your hand.
Resolve the Mystic Sanctuary trigger, putting Capture of Jingzhou from your graveyard onto the top of your library.
Move to your next turn, drawing Capture of Jingzhou during your draw step.
Repeat.
This elegant chain achieves infinite turns by recycling your entire spell suite through a self-sustaining loop. You kick things off by casting Capture of Jingzhou to secure an extra turn, while Ghostly Flicker acts as the engine that resets your resources by blinking Ardent Elementalist and Mystic Sanctuary. Whenever Ardent Elementalist re-enters the battlefield, its trigger plucks Ghostly Flicker right back out of your graveyard, and Mystic Sanctuary's landfall ability ensures Capture of Jingzhou is neatly stacked back on top of your library just in time for your next draw step.