| weeler |
Is the party still in the plane of Hell, if so Hell can be pretty easy because demons and demon lords are always manipulating everything and everyone around them for power. Perhaps this could be an opportune time to introduce this "other more powerful threat". That threat could contact your group by way of some messenger demon, and offer a deal, I'm getting ready to do something similar with my group they are on a current quest to help save one of their own thinking that they are making a demon lord weaker and when they are done they will have just been manipulated into giving the demon lord exactly what he wanted all along. I have a good group and I know this will give them more resolve then ever, and the end game will taste sweet for them (providing they all live of course).