The Cyst
From RocksfallWiki
Yucky extraplanars who seem to have their sights set on the Empire. One was caught possessing a human woman in 2248 (see Diablotin_2_session_71#Dominik_and_Fredericia and Diablotin_2_session_73#Ilphere.2C_Alma_and_Sanadhil); it was presumed to be an advance scout. As yet, little is known about the Cyst other than that they seem to indicate trouble is brewing.