Before Madanach allows the Dragonborn to escape the mine with the rest of the Forsworn, he will require the disposal of Grisvar the Unlucky, as Grisvar has been in and out of Cidhna Mine, possibly leaking information, and thus is suspected of being a spy. With Grisvar dead, Madanach and his followers plan to escape through a tunnel they've been digging under Markarth, leading eventually to the city's surface. Upon reaching the surface, Madanach will give a speech to his followers, after which a battle will ensue between the Hold Guards and his men.