Halve an ability score? Ok that could work. A penance designed around each specific spirit is a really cool idea.
So if a mortal had access to it, they suffer the drawbacks, whatever they may be. Would they still be able to use it as often as a god, even with the drawbacks? Also, I'd figured it...
By weakened, could that be represented by a number unnegatable negative levels that last for 3 meaningful encounters, or would it be better to try something else?
Edit: Also as a side note, if I wanted to incorporate an epic spell inside of an artifact, is there a way with these rules to do that?
I have an artifact, that wants to have the ability to utilize and/or summon previous users of said artifact that died wearing/using it, but I don't think that there is anything in the books that would enable this. If I were to make a new ability for this artifact to use, what rank would be...
In 3.0/3.5/3.Pathfinder, if I had an Artifact with a +234 modifier, what Immortal Rank would be able to have that Artifact as one of its four, and what Immortal Rank would be able to have that Artifact as its only one?