Here is information on warlocks from wotc website.
Part 1 and
Part 2.
Daspian Dra'thir wrote:so my question is in regards to the character background story i'm writing for my Warlock character, in exchange for power (As all warlocks make pacts with beings) he sold his soul...
This is not quite correct.
Warlock class is described in "complete arcane", and nowhere it states that the only source of power is making pact with a fiend. In fact, a fiend most likely will not make warlock on mortal's request, because it requires too much effort on their side, and it is easier to kill a mortal immediately after making such pact. The book only says that "your soul is marked with font of dark magic". Or something along those lines.
Now, following sources of warlock power are available:
1. You can make pact yourself with devil, demon or fey. It is (in my opinion) a very unlikely turn of event for a human to make such pact and live to become level 1 warlock.
2. Your ancestors made a pact with some entity (which could be really desperate). In which case it is unclear to whom your soul belongs now, because by the laws of nine hells you can only sell your own soul and you would need to do it willingly.
3. You belong to some cult worshipping a demon or devil.
4. You're planetouched and draw power from native plane, you were born with the power. Tieflings are the most likely candidates for such warlocks.
In my opinion, successfully making a pact yourself is a very unlikely turn of events. In my opinion, being born with predisposition towards warlock magic is more likely scenario, however starting to learn how to use it would probably your character's choice.
Daspian Dra'thir wrote:
my question is, what does this in your opinion exactly do to him? would this not be possible at all, seeing as a living creature couldn't exist without a soul, or perhaps nothing happens and he is totally fine and just strides down the street humming a tune, waving to miss Applebee who happens to be baking some pies.
If you made a pact with a fiend, your soul is your own until you die. Then fiends will do bad things to it. That's all there is to it.
Daspian Dra'thir wrote:
what i had intended was that he'd be devoid of all emotion and human personality, just goes about drifting staring off into space or "through" people, not that he'd be a mindless idiot, but he just loses complete lack of empathy and disregard for anything and emotion. would this be more inline with something?
Your soul is currently in your character's body. However, you could roleplay character's state being a result of making pact with a wrong entity. Demons, Devils and other entites are not necessarily nice. They could mess your character up in many ways.
DM Eurydice wrote:In DnD terms, it would also mean Raise Dead and Resurrections are close to impossible, usually it's the Gods who grant the return of a soul because they linger in the Fugue awaiting judgement.
This is incorrect.
HOw resurrection interacts with mortals is described in Fiendish Codex II. Basically... if there is no chance of mortal weaseling out of contract, devils can let you go back to mortal realm. They're eternal and can wait couple of hundred for mortal to croak - he or she is not going anywhere.
Devils allow very few souls to return to the Material Plane
and live again. The only souls they release are those of com-
mitted and useful servitors whose eventual damnation is
guaranteed, or those pried from their grasp through legal
proceedings. Thus, when PC signatories of Faustian pacts
die and want to be raised, reincarnated, or resurrected, a series
of scenes set in Baator determines whether they are freed
or ferried immediately to a hellish torture chamber. In the
latter case, the character must be retired.
From page 25 of fiendish codex.
It is mentioned that mortals that made Faustian Pact do not normally return, however, warlock power does not necessarily originate from faustian pact. Turning mortal into warlock would be a big hassle for normal harvester devil and possible standard rewards for faustian pacts are rather mediocre. You can increase your ability for one point, for example, if you get really lucky. Otherwise devil would prefer to buy your soul for one goldpiece, give you goldpiece and immediately kill you.
mireigi wrote:A high intelligence warlock on the other hand, would attempt to find a way to force the buyer of their soul to break the pact. If the buyer is a devil, it will be possible, though exceedingly difficult, to make them break the pact, such as forcing you to give up your soul prematurely. If you can manage that, the devil might let you keep your powers and your soul, as such an act of kindness is favorable to being scrutinized by on of the Lords of the Nine.
And such wizard would fail. The only two reasons for a devil to release mortal's soul: if mortal was deceived or magically forced to write agreement, or if requested reward was not delievered. Devils are immortal and live for thousands of years. Chances of success are incredibly low, no matter how smart your wizard is. Also, devils are incapable of kindness. They can deceive you into thinking that they're showing kindness, of course.
(opinion) It is much more likely to mortal to release his soul from abyssal pact, however, because demons are chaotic. That is, of course, assuming said mortal won't get randomly murdered mid-negotiation on demon's whim.