[quote=@Lugubrious]
Slough can't create new souls.  What's all this nonsense about splitting souls into spirits?  That's so confusing.  How about I lay a knowledge smackdown on you.

[b]A soul[/b] is the incorporeal and immortal essence of a living being.  The characteristics of a soul were outlined in detail and given names by the Egyptian pagan beliefs.  They include the Personality of the being (what makes it unique), the Heart of the being (strong emotion associated with it in life), the Shadow of the being (its impact on the world; comparable to memories), the Name of the being (representative of its power and status), and the Vital Spark (what makes the soul alive).  New souls can only come into existence in sentient beings, but souls can be forced into non-sentient beings to 'empower' them.

Slough's reincarnation takes all five of these soul elements and puts them in a new form.  The Vital Spark is preserved completely, but the other four are dulled by the process to the point of a lack of self-awareness and maybe a lack of sentience depending on the damage, though still essentially the same being.  

I imagine that necromancy, flawed and abominable sorcery that it is, would take only the Heart, the Shadow, and the Name, sacrificing the Personality and the Vital Spark as part of the wasteful process.  Ultimately, this process destroys the soul when the undead body is destroyed, disintegrating rather than rejoining the Primordial Pool.  The Heart provides an approximation of the Personality, but far more emotional and extreme, as befits one who 'came back wrong'.

The Pool, now, should be a well of souls in their entirety.  Dead beings' souls automatically relocate to the Pool upon their death, unless some curse gets in the way, and the souls remain in the Pool until someone does something with them.

<Snipped quote by Frettzo>

I am an enormous fan of the soul-centered RPG where you can kill things or perform odd gestures in front of them, and there's a friendly skeleton.

Undertale?  Pah.  I'm talking

[img]http://media.gamerevolution.com/images/misc/dark-souls(1).jpg[/img]
[/quote]

[quote=@Fabulous Knight]
[@Lugubrious][img]Egyptians didn't make the only ideas of souls, you know.[/img] Pretty sure the whole removing elements-of-soul thing is splitting souls á la Reathos' suggestion.

I was getting a pretty big Dark Souls vibe too.
[/quote]

And I'm LOVING it! Yeah, I'm 100% behind this idea.