i tryed to kill the last named for the heroic weapons lastnight and failed, decided to try in the morning, it was late. when i logged in my BL neck, waist, and cloak were gone. are they supposed to go away? i did a inventory search and nothing.
This is by design. All of those items are consumed by the ritual you perform to open the gate to the private instance and fight the bad-guy. Make sure you fill those spots with other gear or you'll be fighting him with only 3/4 of your gear. I fought him four times before I realized that had happened...