Any thoughts on this for if the PCs manage to capture a certain someone in book 6 (instead of kill)? It's hypothetical, but seemed like fun to think up.
Bellinda sits still in the cell you have prepared for her. The once proud princess no longer wears the most extravagant dresses of the City of Light, but instead the mightiest chains of Zhaansen-Kryr.
There will be no rescues for this damsel: All those loyal to her have perished at Camberlyn. Escape on her own will not happen, the curses torpor her actions while your wraiths and shadows have broken her body and the rings of corruption lay firmly upon her fingers. Even before you lifted the Feeblemind from her she realize the futility of trying to freeze these bar. The dethroned princess spends every waking moment in prayer to Mithra, but Mithra will not be coming in her lifetime*.
Your attempts to turn her with words are quietly ignored, however you swear that though it may take an eternity, she'll eventually learn to kneel before *PC name*.
*The "epilogue" would mention the current state of the Mithran church and it's eventually exile from Talingarde while the setting will have something preventing gods from acting directly. Mithra instead guides his priests to foreign lands, with the hope that his faith will spread and one day, long after the PCs' deaths if they have not obtained immortality, he may liberate his holy land.