Flames of Madness
The city of Waterdeep is one of the most prosperous mercantile ports in the world. It is very accepting of people of all ethnicities, religions and philosophies.
A secret follower of Cyric infiltrated Waterdeep and rose to position in Blackstaff Tower. She abused her position, using it to unleash the corruptive influence of Cyric on the city. She has been stopped.
Everyone who stayed in the city over the entirety of the past few months has a minor spellscar. There are no reports of madness or complete mutation.