This is the event in the keeps where you need to protect the blacksmith for the skeletons.

If you save the blacksmith and kill the unique boss, the molten death blast can kill the blacksmith while you have already completed the protection and only need to talk to the blacksmith the finish the event. But because the blacksmith died in the blast there is no-one to talk to in order to complete it. Before there was a unique boss in this event this was not possible. It is now however.

This happened several times and can reproduce it with ease.
Edited by Belgarion#2893 on 12/2/2012 7:25 AM PST