Ahn'kahar Watcher's Corpse

Ahn'kahar Watcher's Corpse is obtained from killing an Ahn'kahar Watcher in Ahn'kahet: The Old Kingdom. If the duration expires, it turns into Watcher's Corpse Dust.

As a quest objective
All Things in Good Time requires you to burn an Ahn'kahar Watcher's Corpse at the brazier at the end of the instance, essentially tasking you with completing the instance in under an hour.