I don't have any problem with devils and demons being gods. I think it's appropriate, especially for archdevils, to grant power to their acolytes. It would be better to grant disciples of the chaotic demons independent (arcane) power, as that will lead to a more chaotic power structure.
I would like to see a clearer explanation of what a god is in D&D presented in the core rules (probably the DMG), and perhaps expanded upon in a supplement (Deities & Demigods?). Merely stating that gods follow certain rules or provide certain benefits to clerics isn't enough.
My favorite view is that divinity is the founding principles behind the universe, which cannot be altered or destroyed, but gods are just a temporary personification of these elements of reality so can be killed or subsumed. Deities are specific individuals that take on the mantle and powers of eternal portfolios. Thus ultimate Evil is an element of reality and will manifest itself in some way or another even if you kill Asmodeus, the current god of evil. Today Vecna might be able to kill a god and take its place, however, and killing asmodeus would weaken the power of Evil in the cosmos.
My most detailed cosmology was for the Forgotten Realms. Ao was the unchanging eternal Truth, utterly incomprehensible to mere mortals and not truly knowable even to deities. Selune was all the things carved from this reality (the Celestial Planes - things like Nature, Love...) by arbitrary division (Mystra, the Astral Plane), with Shar (the Lower Planes - Evil, Darkness...) being all that remains, the shadows of the things that are, the dialectic opposite of the defined created by the definition. Each deity was a concept (e.g. Nature) and a plane manifesting it in its true Platonic form, with subdivisions spewing new planes or parts of planes and deities (Selune/Existence has a part which is Silvanus/Nature which has a part which is Mielikki/Forests, which in turn includes forest animals like Lurue/Unicorns).
frankthedm said:
More to the point, was Asmodia / Amosdeus named in Old or New Testaments? I found a mention from Milton's paradice lost, but how much has been biblical canon?
Ashmadai is also mentioned in some Jewish legends regarding King Solomon, as alluded to above.