Souls

Souls are the eternal, non corporeal spirits of most, if not all lifeforms on Nosgoth. Souls live on after death, when they cross over to the Spectral Realm. Souls feature throughout the Legacy of Kain  series, most notably in the Soul Reaver arc as Raziel had to consume souls to survive.

Souls were seen in Blood Omen, Soul Reaver , Soul Reaver 2 and Defiance. They varied in appearance from green globes to transparent outlines of the person or creature. Raziel fed on Souls throughout the Soul Reaver arc and consuming souls filled his Soul Spiral health guage. Feeding on the souls of his brothers would also grant him new abilities. As Raziel's Soul was consumed by the Blood Reaver, it inherited his soul consuming abilities, becoming The Soul Reaver.

Souls apparently had their origin in the Elder God 's Wheel of Fate ; the cycle of life, death and rebirth. All of Nosgoth's inhabitants apparently had souls. The soul of a Human, Vampire or other creature inhabited the body until death when it departed for the Spectral Realm. (although wraiths such as Raziel could apparently observe souls lingering in the Material Realm for a short while.) Whilst humans die and release their souls to the Wheel of Fate, the Blood Curse means vampires are immortal and their souls are "imprisoned in the flesh" which clogs the Wheel of Fate. Their Souls can only be liberated by death.

When Souls reached the Spectral Realm they could be fed upon by agents of the Elder God, (such as Raziel and the Archons) and would presumably be respun in the Wheel of Fate. Whilst in the Spectral Realm however, the souls were vulnerable to soul scavengers such as Sluagh and Vampire Wraiths. Vampire souls, if left in the Spectral Realm long enough could grow accustomed to it and become Vampire Wraiths.

The relationship between Souls and ghosts is unclear though it appears that some souls (perhaps those with 'unfinished business') were able to manifest in the Material Realm.