Your next step takes you, along with the Extra-Dimensional Ghost Revealer (from now, E.D.G.R.), to the entrance of Stratholme to talk with the ghost of Anthion Harmon (Alliance/Horde). He is in front of the Meeting Stone, click on your E.D.G.R. to see and interact with him. The effect of the E.D.G.R. has a cooldown of 1 minute and a duration of 10 minutes. He will give you the quest Dead Man's Plea and asks you to rescue Ysida Harmon from Baron Rivendare. After you accept the quest, travel to the second entrance of the dungeon. The quest is a timed event, requiring the group to engage Baron Rivendare in combat within 45 minutes once the second gate from the Stratholme service entrance has been opened.