"Garth Agarwen . . . The ruins of an ancient fortress of Rhudaur, now overrun by corrupted nature and a vile necromantic power out of Angmar. The most terrible power still remains to be confronted."
Not all who occupy Garth Agarwen are given over to corruption. Some are taken from their homes or the sites where they worked and brought to the ruins where they are enchanted and taught a new way of thought through foul magic. The Creoth warlord, Dunlang, is possessed of the gifts of Angmar and captures members of the Eglain to corrupt and turn into mindless minions of the Red-maid.