I did not expect Duskmourn to play a part in this story at all. The thought of Valgavoth as a team principal with his followers as drivers/members is rather funny.
There are quite a few plot threads and possible endings for this story. Maybe the Aetherspark really is unstable and whoever uses it ends up at the Edge of Eternities. Or Valgavoth gets it in his wings and begins to domesticate other planes to really become the current big bad. Or something completely unexpected happens.
Whatever it is, I'm now even more interested in the setting than before.