The Raven's Eye

The Raven's eye is according to Vrykul Legends created by Havi to allow Huginn and Muninn to read "anything your little bird brains desire", only to later be stolen by the sly elf Ravencrest. With the eye, Ravencrest nearly perfected espionage to the point that the tale of raven's eye became an "ol' wives' tale to scare little rogues who are wantin' to keep their secrets hidden."

Source
This item drops from Dantalionax in Black Rook Hold in Val'sharah.

As a quest objective

 * Black Rook Hold: Into Black Rook Hold