From mine, right before yours, nothing really special will carry into yours - the idol will effect the final battle, unless you want there to be some kind of parting bonus Yogah gives for your scenario if the heroes win. the fragments of the idol will be also there if the heroes win, which can harm the Dark Demon - i was thinking they would be forged into the heroe's existing weapons somehow, or added into hilts, something that could take place while your scenario is going on, unless you are using the Dark Demon, then perhaps the shards are usable in yours. if so you can feel free to figure out how they work in terms of narrative and the harming the demon.