Cold One Transformation

The dragons and their servitors, including other Cold Ones and the Aes Sedai cult, amongst other goals and plots, desire to increase the number of servitors to better serve the dragons when the dragons retake power and establish dominion over Pettylin, and perhaps the rest of the world.

To achieve this, they have developed a means of magically transforming humanoids into Yuan-Ti.

It is not clear how this takes effect, whether it is the result of a magical disease, a magical ritual, or a magical potion that is slipped into food, but the transformation is magical in nature. At present, the transformation process appears to be irreversible, but the process can be arrested if a certain potion, containing the blood of a dragon, is ingested.

The Drake Purist Zerxt taught the adventurers, including the scholar and alchemist Dr. Koppel Schleppen, to brew such a potion.