The Jade Serpent of Yig is #7 in the Focus on Freeport series of free articles further detailing elements of the port city. Describes a major artifact introduced in Madness in Freeport. Includes game fiction (giving the fictional history of the item), its place in the Valossan culture, appearance, powers (with separate levels of attunement), the negative consequences of using the artifact, how to destroy it, and three adventure hooks.