From the Bur Recall Quest quest introduced in Strange Sightings.
Dropped by Watcher in the Warren in the Secret Chamber of Kresovus.
This shard of black obsidian throbs with the unwholesome magical emanations of the chaotic Virindi. This item cannot be read.
Special Properties: Attuned, Bonded
[You cannot understand the writing on this.]
-- Unknown
Diyas al-Yat doesn't know what to do with that.
Ecorto the Lost Director doesn't know what to do with that.
Give to Oswent the Pale in Cragstone for the Scroll of Bur Recall.