This heroic quest is part 8 of the Claymore Timeline. You must have completed the previous steps to begin this one.
Steps
Xhorroz now needs you to find three dreadknights and their daggers. When you reach each location, an NPC skeleton will appear then fall dead to the floor. You must right-click the body and select 'search'. When you do this, an encounter of 3 droags will spawn. You must kill them.
The first corpse is found on the way to The Gorgs' Pit on the blue vapor grid at ( -32, 57, 243 ) Copy/waypoint -32, 57, 243
You must now move to the Pool of Spirits for second skeleton at ( 59, 45, 103 ) Copy/waypoint 59, 45, 103
Last corpse is in the right corridor leaving Hall of Rites ( -66, 65, -57 ) Copy/waypoint -66, 65, -57
If you can't interact with the skeleton try zooming-in your camera view to First Person and/or crouching. Some of the larger races have camera positions too far above the floor for these to be interacted with.