Grackle will work on converting as many refugees as she can. But Grackle will be smart. You can’t just burn people alive when trying to build a movement.

I plan on having it be a small number of NPCs. How big Grackle’s movement gets will depend on other PCs in the thread. If a player character joins I think it only fair that a large chunk of NPCs also come with them (though I can’t imagine anyone’s character joining a sun cult). If those in the thread deem it more interesting to have an evil cult grow large I can make that work too. I had intended on it being small though, a desperate number of refugees looking for anything to believe in grasp hard unto the ideals of one crazed kenku and the other players in the thread have to grapple with how to handle their religious freedoms.