Cast Notorious Throng 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 Notorious Throng from your graveyard onto the top of your library.
Move to your next turn, drawing Notorious Throng during your draw step.
Repeat.
This engine locks down the game by chaining infinite turns, fueled by Ghostly Flicker repeatedly resetting your setup. Ardent Elementalist handles the instant and sorcery recursion by pulling Ghostly Flicker right back out of your graveyard, while Mystic Sanctuary manipulates your library to place Notorious Throng back on top just in time to be drawn on your next extra turn. Because Notorious Throng's prowl cost allows you to take an extra turn after dealing combat damage with a Rogue, you can continuously cast it, take your turns, and repeat the entire loop without giving your opponents a window to breathe.