Dormammu
Explorer
Or it could even be an "everyone vs demons" thing wherein demons represent a threat to all. There would be tons of room for politics as other planar forces form uneasy alliances when the threats are stronger and fall to fighting each other when demonic activity slacks.Najo said:You could reinvision the Blood War as a planar conflict between the demons, devils, angels and such, similiar to the idea in planescape, but with the factions being involved in it and various militant groups of outsiders instead of the Tanari and Bazatu.
I think this might fit well with the new conceptions of the Abyss as different from other outer planes.