Guul, Elder God of Death

Guul is the Elder God of Death. He is responsible for the creation of the introduction of death to Somara, as well as the creation of several other Gods. Like the other Elder Gods, he is currently sealed in his own plane of existence, called Morta.

The Librum ad Finem mentions Guul as one of the beings who will bring about the end of Somara by consuming the spirits of all living things.

Creation of Somara
After Valazar had created the Prime Material Plane and had begun populating it, Guul realized that he could consume the spark of life that is inside each living thing (also known as Spirit), which he could harvest to grow his own power. He began preying upon Valazar's creations, before deciding to use his own power to make this process easier. He created three deities: Nox, the Shepherd of Death; Caius, the God of War; and Xyas, the Goddess of Pestilence. This trio became known as the Triad of Entropy.

After that, he created perhaps his most important contribution to Somara: mortality. He wove part of his own essence into the Spirit of every living being on Somara, allowing him to claim that spirit when they die.

After Talus was able to bar the spirits of mortals from Guul, he enlisted the help of Vorokar in tempting mortals to ruin, allowing them to be delivered to him once more.

When Neket sealed the Elder Gods from Somara, Guul was sent to the plane of Morta, where he currently remains.

Appearance
Like the other Elder Gods, Guul is sealed off from Somara, though he frequently uses the Breach in the Seal to communicate with his minions. Those who witness Guul's form and remain sane report that he appears as a massive, morbidly obese creature with vaguely humanoid creatures, with skin of a pale greenish pallor. No descriptions of Guul exist in a mortal form, as no accounts of his appearance exist from the First Era, and of the few mortals who appear to have glimpsed Morta, none have seen Guul there in anything but his natural form.

Worship
In Somara, Guul is the third-most worshiped Elder God, after Yfuleg and Vorokar. No official church or religion exists centered around him, but there are cults to Guul who wish to gain mastery over death in exchange for sending souls to him. In the same vein, Guul holds a begrudging respect for liches those who obtain immortality, admiring the lengths they go to in order to escape his curse.

Guul will occasionally grant power to mortals that he feels can act out his will on Somara, making them warlocks under the Pact of the Great Old One. He generally tasks his warlocks with the destruction of life, and instructs them to perform rituals that will circumvent Neket's seal on Morta, allowing them to send him the spirits of those his warlocks kill.