"The spirits of corruption send their minions from the Forbidden Lands. As for how you deal with them, you kill them, sometimes hoards of them. However, those marked by the spirits of corruption often have terrible dreams, and then they sleepwalk towards the cliffs. If they are not kept bound when they sleep, they walk towards the Forbidden Lands. Some go mad from nightmares.
"However, there is said to be one certain way of ending the corruption, though no one has ever done it before. Enter the Forbidden Lands and destroy the heart of the corruption within it," Abdul says in deep and musical tones.