Happy souls

Two knights in white armor rappel down a rope into a volcanic cavern with lava flows, while the title "Iron Keep" appears; a large, dark demon with horns and wings roars in the lava, followed by a close-up of an old man with white hair and a beard, who raises a wooden staff above his head, then the scene cuts to a wide shot of him standing in a courtyard, holding the staff aloft as the two knights approach in the distance.