Tharizdun

(a.k.a. The Mad God, The Chained God, The Elder Elemental Eye)

Tharizdun, also known as The Chained God and The Elder Elemental Eye, was a long-forgotten interloper god originating from Oerth who sought to destroy all that is. During the Dawn War, he created the Abyss, an act for which he was imprisoned by the gods. His followers hoped to set him free.
Tharizdun was not simply neutral evil; his evil transcended law and chaos, reflecting a primal nature so ancient it went back to the early days of the Great Wheel cosmology.
In the time when the multiverse was young, Tharizdun was a power hungry deity who was not happy with the idea of sharing the multiverse with the other gods, and for a long time he searched for something that would give him an edge against them. In those times, he joined his fellow Oerthian deity Pelor and a Nerathian deity, Ioun, who were also interested to discover the secrets of the multiverse. They eventually found the Living Gate, that separated the Far Realm from the Astral Sea. The three gods peered through it, learning terrible secrets that changed them forever, among them the weapon he was searching for.
Some time later, when the gods were fighting the primordials during the initial stages of what would be known later as the Dawn War, Tharizdun returned, killed the guardian of the Living Gate and opened it, releasing corruptive energy from the Far Realm into the multiverse. From the Far Realm he retrieved a "seed of chaos" from a dead universe, the Shard of Pure Evil of the obyriths. Through the shard, the obyriths changed his mind and spirit, corrupting him in an instant, driving the deity to madness.
But the obyriths' plan to seize the celestial realms controlled by Tharizdun and his kind was met with resistance and a twist they had not anticipated. The obyriths demanded Tharizdun to plant the seed of evil within the Astral Sea, promising him total dominion of that realm in exchange for his fealty. Even within his madness, Tharizdun recognized that his fellow gods would turn on him before he could fully seize the power the obyriths promised. Instead, the mad god traveled to the farthest reaches of the cosmos, planting the seed of evil in a primordial expanse of the churning Elemental Chaos, which he hoped to seize as his own.
This seed eventually grew into the Abyss, and though the act gained him great power, the other gods of the multiverse temporarily put aside their differences in order to imprison him.

Holy Books & Codes

Tharizdun's exact dogma is unknown, as the ages he was imprisoned in the Abyss along with his own growing insanity left him unable to communicate in a meaningful manner. Even when he appeared to his followers, he only spoke to them in the form of a shrieking babble that was impossible for mortals to comprehend. The following are his assumed teachings, followed by his cults.
"Channel power to the Chained God, so he can break his chains. Retrieve lost relics and shrines to the Chained God. Pursue the obliteration of the world, in anticipation of the Chained God's liberation."

Divine Goals & Aspirations

Pursue the obliteration of the world and claim dominion over all existence.

Divine Classification

God