Soul devouring

The soul ability is a ability only known by Raziel. It was apparently given to him by the Elder God after meeting him the first time. It gives Raziel the ability to devour the soul of his enemies after he kills them. To use this ability, he needs to remove his cowl and then any nearby soul will be absorbed by him. Ever since his health is slowly, but surely decaying, he needs to use this ability very often. He can use this in both the physical and the spectral realm anytime. It is also shown that after he kills a game boss, the soul is automatically absorbed, so it is possible that Raziel can absorb the souls of stronger enemies by will. It is revealed that because of this ability, the Soul Reaver is made when he is absorbed by the Blood Reaver. This ability is also seems to be used by the Wraith Blade when activated.