The Red Wizards of Thay are an organization of wizards in Faerûn. During their height of power, the Red Wizards were the notorious and nefarious spellcasting ruling class of the inhospitable but well-inhabited country of Thay. Slavers, demonologists, and magical experimenters, the Red Wizards were much feared by most of Faerûn.
The leaders of the Red Wizards, and of Thay, are known as the eight zulkirs, each for a different school of magic. Chief amongst these, and, indeed, among all Red Wizards is a powerful archmage and feared lich and now the ruler of Thay and sworn enemy of the Red Wizards who escaped him. Since his takeover, the Red Wizards have transformed enormously, becoming a loosely organized chain of merchant enclaves who specialized in procuring magical items.