Recently in the campaign I am running my group has come across a very talented Alchemist and Wizard who created them (yes I know not truly a plausible creation) character specific Vials of Resurrection. They recently had to use this among Devils, Demons, and Deamons now I am considering the possibility of the corruption of their souls and what the proper will and or fort saves would be to resist this. I have also considered having them slowly turn undead if those saves are not made instead either way giving the party members something to hide from the rest of the group. So any advice on a good system to use to make this a slow transformation or can anyone point me in the right direction when looking into this type of thing?
Vials of Resurrection, by the book would only be useful for use on characters who have died and want to/should be brought back to life. If the plan is, if a character dies, and then are revived by the potion, then they suffer 'adverse' effects, you need to establish what it is exactly you want changed in addition to that.
As for a general example, a lot of change results from Transmutation spells. If you're thinking more physiological changes, your best bet are spells like Beast Shape, Undead Anatomy, Form of the Dragon, Plant Shape, and Elemental Body, as they deal with the caster taking the form (and if it says so, the listed abilities) of the subject they transform into. Perhaps having a character receive the benefits of the 1st rank of these abilities at first and then slowly progressing to the final rank may be the best bet.
Although there aren't any spells that allow you to emulate things like Demons, Devils, or Daemons (that's the proper spelling, though I have no idea why Demons and Daemons are separate entities), a lot of that stuff delves with rituals and circumstances that lead characters to directly turn into those creatures (i.e. Shadow draining all the strength of a character turns him into a Shadow ~1D4 rounds later), and is something you should look into if you're looking for a more direct conversion.
Another alternative is to look at the Reincarnation spell, modify it to suit your needs, and just roll with that. Ultimately, pick your poison from here and I'm sure your game will last just fine.
Thanks that is a big help.
Vials of Resurrection, by the book would only be useful for use on characters who have died and want to/should be brought back to life. If the plan is, if a character dies, and then are revived by the potion, then they suffer 'adverse' effects, you need to establish what it is exactly you want changed in addition to that.
As for a general example, a lot of change results from Transmutation spells. If you're thinking more physiological changes, your best bet are spells like Beast Shape, Undead Anatomy, Form of the Dragon, Plant Shape, and Elemental Body, as they deal with the caster taking the form (and if it says so, the listed abilities) of the subject they transform into. Perhaps having a character receive the benefits of the 1st rank of these abilities at first and then slowly progressing to the final rank may be the best bet.
Although there aren't any spells that allow you to emulate things like Demons, Devils, or Daemons (that's the proper spelling, though I have no idea why Demons and Daemons are separate entities), a lot of that stuff delves with rituals and circumstances that lead characters to directly turn into those creatures (i.e. Shadow draining all the strength of a character turns him into a Shadow ~1D4 rounds later), and is something you should look into if you're looking for a more direct conversion.
Another alternative is to look at the Reincarnation spell, modify it to suit your needs, and just roll with that. Ultimately, pick your poison from here and I'm sure your game will last just fine.
Devil = LE
Daemon = NEDemon = CE
2nd Ed Planescape had corruption rules.
/cevah