A couple of quick comments regarding Quertus and bringing back the dead in the Forgotten Realms.
1) Quertus would not believe that he could raise the dead with limited wish. While living in Menzoberanzan, Quertus never heard of any drow spellcaster, divine or arcane, who brought back the dead. Quertus has only heard one rumor of one drow returning from the dead, Quenthel Baenre, and he heard that that was accomplished through an extremely deadly and costly quest (which costs the lives of several nobles from House Baenre) and the quest had the blessing of Lolth. There is also a rumor that Quenthel came back CHANGED (i.e. sort of like Gandalf the Grey to Gandalf the White, except that Lolth had modified Quenthel's personality not her powers) and that Lolth hard wired various quests into Quenthel's brain. Quertus has heard of surface divine casters who have brought the dead back to life, but he thinks those might be charlatans.
3) In the Forgotten Realms, Raising (or Resurrection or Reincarnation) of the Dead requres the permission of the target as well as the permission of the target's deity. Good Deities will usually grant permission if their petitioner was a hero and desires to return to life to commit more heroic deeds or for love or some other "good" reason. Evil deities rarely grant permission (see #1 above for the example of Lolth above) and only do so under stringent circumstances; Irae (an extrememly high ranking cleric of Kiaransalee) only has permission from her Goddess to restore her daughter Dorina to life (according to the module). Quertus and the surviving party members (Tierak, Carcelon, and Narcelia) could attempt to negotiate with minions of the appropriate divine beings for the restoration of the slain party members. Demogorgon is probably worse than Lolth with regards to getting souls of his worshippers back, since he is evil and likes to eat the souls of his minions. I have no idea regarding Hruggek (who is chaotic evil), but our resident expert on Bugbears (Brother Shatterstone) can give us insight on how likely it would be for Hruggek to let one of his souls go. With regards to Lolth, there is the additional problem that she is silent; unless you can re-establish communication to Lolth, there is little hope of recovering Zieggrek's soul. Finally for Matron Ki'Willis, there is also the issue of whether the wavering Ki'Willis had faith at the end; if she died faithless she could be in a particularly bad place in the Underworld.
3) Resurrection or Reincarnation would work to bring Matron Ki'Willis, Kilcif, Kripp, and Zieggrek back to life (assuming you get past points 1 and 2). Raise Dead would not work since none of the slain bodies are in appropriate states of condition for Raise Dead. For reasons of points 1 and 2, I'd recommend the scrolls of Create Undead the party is carrying around (or buying new scrolls).
Xael said:
And yes, it could be theoretically possible for Quertus to raise everybody exept Matron (and maybe Torellan, if the Balors destroy his body). But hey, if Endur says it's over, then it's over.