Tharizdun

Tharizdun is described as a pitch-black, roiling, amorphous form, black and faceless.
Story
He was imprisoned ages ago by a coalition of deities to prevent the destruction of existence itself. Although imprisoned, Tharizdun still has a degree of his original multiverse-threatening power. His prison may weaken at times, allowing his influence to creep out into the worlds beyond.
Motivation and Philosophy
Tharizdun's doctrine is to destroy all and everything encountered.
Relationships
It is believed that Tharizdun has no allies, given his desire to destroy the entire universe. Should he ever escape from his prison, it is thought that even the most evil of deities would work with their good counterparts to return Tharizdun to his prison. However, the Dark God has been known to work his will secretly by employing various demons (with or without their knowledge) to do his bidding.
Tharizdun is particularly opposed by Pelor and Boccob .
Resources
REALM The Demiplane of Imprisonment is hidden somewhere in the depths of the Ethereal Plane, resembling a swollen, crystalline cyst nearly a mile in diameter. The ethereal substance surrounding the demiplane boils with the dreamscapes of Tharizdun's worshipers and others whose dreams the dark god invades.
Most of Tharizdun's ancient scriptures are long lost. The only one known to remain is the Lament for Lost Tharizdun, penned by his last cleric.
TEMPLES
Tharizdun's temples (often in the shape of black ziggurats) are usually hidden, due to necessity. It is said that public knowledge of one of his ziggurats would be enough to "raise an army of paladins".
ARTIFACTS
Tharizdun has many known artifacts.

• A collection of gems known as the 333 Gems of Tharizdun.
• The horn known as the Wailer of Tharizdun
• The Sword Druniazth
• The Spear of Sorrow.
• The Scorpion Crown.
• The Weeping Hexagram (in the hands of the Scarlet Brotherhood).
• There was a set of three artifacts known as the Theoparts

Additional Details WORSHIPPERS
Tharizdun's worshipers are often insane. Their ultimate goal is to free their dark deity from his prison.
Tharizdun is sometimes worshiped by nonhuman aberrations such as aboleths, neogi, and grell.
CLERICS
Like his lay worshipers, many of Tharizdun's priests are mad. Those who are not mad believe that they will reap great rewards and privileges for their aid in freeing him. All of his clerics are extremely secretive and trust only fellow cultists. They lead foul rituals, including human sacrifice, and search ancient sites for clues to freeing their deity. Due to Tharizdun's imprisonment, his priests must remain in contact with a site or object holding some of the Dark God's power in order to use their magic. Their favored weapon is the Spiral of Decay.

Chaotic Evil
God of Eternal Darkness, Decay, Entropy, Malign Knowledge, Insanity, and Cold