11. Pyat Pree
A warlock of Qarth, Pyat Pree played a part in convincing Daenerys Targaryen to visit the House Of The Undying during her visit to the city. Though the Undying Ones planned to steal her dragons, one of them, Drogon, instead burned the house to the ground. In the television series, this resulted in Pyat Prees death, but he lived on in the books. In Meereen sometime after this event, Daenerys was visited by Xaro Xhoan Daxos, the Qartheen who once sought her hand in marriage, who informs her that Pyat Pree left for Pentos, accompanied by three other warlocks, in order to seek revenge on her for the burning. Given that Daenerys isnt in Pentos, this would seem irrelevant were it not for the fact that a throwaway comment in a Victarion Greyjoy POV reveals that Euron Greyjoy captured four warlocks on a ship from Qarth, killing one and feeding him to the other three, who have begun to teach him the arts of black magic. It would seem that Pyat Pree is one of these three and will contribute to whatever malevolent scheme Euron (a character who we have barely seen thus far, but who has textbook villain traits) is concocting.