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Legend
Totally parroting what [MENTION=42582]pemerton[/MENTION] said. Back when I ran Planescape the PCs had to revive the god Osiris who'd been cut up into bits by the god Set. Their task was to recover the various organs/body parts for Isis so a spell could be cast to revive Osiris. Just what each organ/body part was I played around with. I think the heart of Osiris was the high priestess of Isis, so there was the question "what happens to her when we revive him?" And then the skull of Osiris was a mimir (an actual talking skull). I also incorporated a lot of Egyptian mythology about death into the whole thing.
[MENTION=5868]Olgar Shiverstone[/MENTION] Awesome
[MENTION=6667922]scott2978[/MENTION] With your scenario, the biggest stumbling block I see is "why the hell would we do this Corellon?!?" I don't think you've yet given a convincing enough reason. I mean, drow are gathering to assault the surface; most players are going to go "Oh yeah? Let's get all our good allies together and kick their asses back to the darkness!" Why is Lolth needed? What can she do that another deity could not to stop the mounting invasion?
Also, I'd imagine other Seldarine (and good deities in general) wouldn't be too keen on Lolth's resurrection...of course, neither would Kiaransalee or Selvetarm. So in addition to the great advice above, I'd expect part of the PCs' quest would be getting support (or at least non-interference agreements) from the Seldarine / good temples.
[MENTION=5868]Olgar Shiverstone[/MENTION] Awesome

[MENTION=6667922]scott2978[/MENTION] With your scenario, the biggest stumbling block I see is "why the hell would we do this Corellon?!?" I don't think you've yet given a convincing enough reason. I mean, drow are gathering to assault the surface; most players are going to go "Oh yeah? Let's get all our good allies together and kick their asses back to the darkness!" Why is Lolth needed? What can she do that another deity could not to stop the mounting invasion?
Also, I'd imagine other Seldarine (and good deities in general) wouldn't be too keen on Lolth's resurrection...of course, neither would Kiaransalee or Selvetarm. So in addition to the great advice above, I'd expect part of the PCs' quest would be getting support (or at least non-interference agreements) from the Seldarine / good temples.