I’ve been pondering what to do for a large story arc in a Planescape game. How to come up with something epic to be simmering behind the scenes.
Thinking about it I’ve come up with the goal of a good PS gm is not to answer questions about the setting, but to get the players to ask more questions. Never reveal everything but hint at everything.
I also thought on what would scare a Baernaloth. What would really get under their skin. And one thing I came up with is a Baern that is obsessed with the past. “What came before!” running across what could possibly be an old displaced version of the great wheel complete with a few shriveled exemplars, reduced to almost nothing but still being no matter how they shrink, and have them identify him and his as the ones that came after them, implying that he will eventually share their fate.
Also adding the allusion to “seeing signs of the next existence leaking into the multiverse in the form of the outer realms/lovecraftian D&D stuff and you could hit a being like that with cosmic horror. Of course leave it up to the players to decide if it is real or not, leave enough doubt.