Thanks, boss :)

Thank you, glad you think so :)

Hello @corporateturtle6005 So I looked into this and I wasn't able to find any connections between the Serpent and Dendar. The closest thing might be the Vecnan cults' activity in the Plane of Dreams. The Serpent would appear to be more powerful than Dendar herself, especially if we accept that they are equal in power to the Lady of Pain (and that they are Ancient Brethren with Asmodeus). The Serpent is also much more deity-like in that they do not directly influence the physical world while Dendar appears to have a much more corporeal form as she can appear throughout the Fugue and Gray Wastes and battle adventurers. Though she was trapped at some point as shown in Tomb of Annihilation. Vecna also never seemed to pursue any of the purported goals of Dendar, so if there was an allyship between Vecna and Dendar as the Serpent, Vecna never pursued Dendar's goal of devouring the sun and destroying Abeir-Toril as well as consuming nightmares. Of course the wrinkle in the story might be perfect for a campaign!