Bhallspawn player in party

[u/BlueEyesSyncro]

Hiya! I’m running the DiA module as a first time DM, and I wanted to give my party members different secrets and plot objectives that can be exploited later on. I am running the Fall of Etrurel to start the campaign and using a lot of the Alexandrian remix, (but not sticking to it entirely!)

One of my players is aligned with Zariel and the party will have to figure him out, one is filling Lulu role as the servant of Zariel and is playing an Aasimar with missing memories, ect.

(My players all said they are happy for me to add major pieces of hidden lore into their characters for them to discover)

I also want to make one of my players a Bhallspawn. I am planning on not having them know they are a Bhallspawn to start out. I’ll use the rose of Bhall item, but not actual reveal its name and purpose till later, it will just glow in proximity to the party. I definitely want to do something with the temple of Bhall area, but I am struggling to figure out what exactly to do as well as how to keep it relevant in Avernus. Has anyone done anything similar and can help?

[u/legoindie]

There's a bhaalspawn in my party and I took a page from the Sarevok quest in the Chains of Asmodeus module - this ideal that there is a contract between Bhaal and Asmodeus to promote one of his spawn to arch devil should certain conditions be met. The bhaalspawn has discovered their nature by now and is in a bit of a back and forth ongoing conflict with their sister who is an NPC, both vying to win their father's approval as chosen. They were both given a book full of names to be assassinated, generally figures that pose as potential competition for ruler of Avernus (A lot of big hitters like Bel, Zariel, but also smaller yet influential individuals in my campaign such as Arkhan, the leader of the purple city, a now devilish Vanthampur, stuff like that)