Warlocks of Qarth
The warlocks of Qarth practice mystical arts and aspire to greater knowledge and understanding, along with the power of immortality. They are led by the Undying Ones, extremely old warlocks who reside in a large tower in the city of Qarth, called the House of the Undying or the Palace of Dust. The warlocks drink a hallucinogenic elixir called “shade of the evening” made from the blue leaves of a tree, which turns their lips blue after many years.
The Undying Ones sent their agent, Pyat Pree, to Daenerys Targaryen to convince her to seek their aid and wisdom. Against the advice of Jorah, Xaro, and her bloodriders, Daenerys entered the House of the Undying. There, she witnessed many visions, some of the past and some that may foretell the future. In the final chamber, the Undying Ones revealed their true intentions and tried to kill her. Drogon set the tower aflame and Daenerys managed to escape. As the tower burnt down and killed the Undying Ones, Pyat Pree attacked Daenerys, but was stopped by her bodyguards. Left alive, Pyat Pree and the surviving warlocks gather, with the aim of getting revenge on Daenerys.