House Phiarlan  (Mark of Shadow)

House Phiarlan is an elven dragonmarked house known throughout Khorvaire, although they are primarily based in Aundair, Breland, and Thrane. To the public, Phiarlan is a house of entertainment composed of bards, actors, artists, and acrobats, though in secret it is a house of spies. The public face of House Phiarlan is the Entertainers and Artisans Guild, which manages most of the entertainment industry of Khorvaire, but they also secretly run the Serpentine Table, which collects and sells information.
Recently, a portion of House Phiarlan splintered off to form House Thuranni in an event known as the Shadow Schism.