Sigil Of The \"Emotion\". (Tyranny)

I got him on the platform in the main hall (where the blue ball), the quest the Gap between the worlds. To open the bridge to the platform you need a stone key from the Old Walls on the quest in the crossroads Letany.

I do not remember exactly.. like in the Library found. Almost at the end of the road, with the river of lava there is a nook. The first time he did not notice. South-West of the map.

After the first spire at Al can take, if the quest asked for a reward in the form of magic.