The Conjunction of Spheres Has Begun

You return back at the Nilfgaardian Camp in Undvik. The sky crackles with furious energy. A gate between worlds is forming, and you must reach the distant Tor Gvalch’ca (tower), and stop Avallac’h before it is too late. Ask Yennefer what to expect if you like (her response isn’t the most optimistic). Then set off with Yennefer. Head southeast, through the giant’s gate, dashing past the huge disintegrating ship and following the path around to the west. Avoid any falling fire by giving it a wide berth. Whistle for Roach at Hjalmar’s old camp—now a Nilfgaardian outpost.