Anyone ever hear of Shagrath? And no, I don't mean the Dimmu Borgir guy. It was a spider god that was created for Arduin, an RP system that came out in the 70's, and was taken off the market for being too close to the original TSR D&D. Basically the guy got sued until he went bankrupt, and TSR was #1 in the monopoly again.
Anyways, I needed a spider god for my Pathfinder game, but it's just going to be about the strength of an avatar. A near fallen god, if you will. I plan on taking the game to epic levels (even though the book doesn't exist, and the core book only gives suggestions as to how it might work), and the current synopsis is that they've been fighting undead, oozes, and spider swarms. All of which have an ancient symbol, talisman, or holy symbol that no one recognizes. Even the religious texts that should explain it are either missing, or the pages have been ripped out. The reason being is that no one wants anyone to know about Shagrath. In Arduin, he was considered the first god of all things evil and chaotic. He actually created evil itself. He was also the creator the (blood) red moon, and disharmony. You can read a bit about him in this blog.
http://www.arduin.com/blogtest/?p=120Well the time has come to fully resurrect him, and I need to build him. His faithful disciple, Selene, will finally be able to bring him back. Just need sacrifices, which the heroes are thwarting. She can be read about here.
http://www.uesp.net/wiki/Lore:People_S#Selene She seems like pretty good lich material. Unless someone else knows of a way to put your lifeforce into something, and still remain human, and yourself.
As for how to build the guy, I was thinking of making him not so much a monstrous spider, but maybe give him a drider look like Lolth. Take her aspect from the Miniatures Handbook (CR 11), and add levels of cleric to it. I was also thinking cleric/magus/mystic theurge, but that might be a bit much, and not have enough kick to it for BAB. A third option would be go up as one of the four Super Genius Games godling classes. Likely be the Adept Godling. Goes up as a bard in levels for spellcasting, BAB, skill points, and saves. Gets more godly abilities though. I'm not sure if I want to make it so high that it's a CR 30, but that might be how it comes out.
There's no listed rules for NPC wealth that high, nor PC wealth. I'm kind of guessing on that one. Probably goes back to D&D wealth.
Right now the only attack the aspect has is bite. Shagrath doesn't have a favored weapon yet either. I honestly wish I had a copy of the original Arduin books, but they're so ridiculously rare, that the game wouldn't exist if someone hadn't made mention of it online. I don't want to give him a whip like lolth. I also don't want to just give him a reach weapon. That's too cheesy a "just because". Be nicer if it was thematic.
I actually looked up "spider weapon of choice" and got "handheld 'bowel disruptor'" as my answer. It's a gun. I don't think I'll go with that. It causes wracking pain and sometimes unconsiousness. Hmm. I might keep that part of it. It also listed a bandolier of explosives. I have a gunslinger in the group so that could work I suppose.