Chronicles of Khaldun: Crux of Eternity
Keboak is a mercane, a race of merchants specializing in magical items. He traveled out to the Elemental Chaos to find the Shields of the Sorrowfell, having apparently heard that they carry many magical items.
He also apparently has a shop in Sigil.
Also, credit where credit is due. Image source:
Concept Art House. “Storm Roc” (2008, May 19). Paizo Blog.
The Thief and the Cobbler. Dir. Richard Williams. Perf. Vincent Price, Matthew Broderick, Jennifer Beals, Jonathan Winters. DVD. Miramax, 1995. Retrieved October 22, 2016, from http://www.dungeonsanddrawings.com/2011/05/mercane.html