Church of Blibdoolpoolp

Divine Origins

After the kuo-toa were driven from the surface, they were captured by the mind flayers and forced into slavery. Unable to resist the illithids' psionic oppression, the peaceful kuo-toa were driven to insanity and to an extreme religious fanaticism, inventing deities upon which they relied for protection against their enemies, most notably the drow. If a large enough number of kuo-toa believed in an invented deity, it manifested a physical, albeit nonsensical form.
Some sages maintained that Blibdoolpoolp was simply the most prominent among the deities invented by the kuo-toa, most likely the result of a human statue having been modified by a kuo-toa by adding a crustacean head and appendages and then worshiped as a deity. So intense was the insane fervor of kuo-toa priests that they managed to manifest as clerical powers. Notably, the nearly-extinct, ancient kuo-toa tribes of the open seas, mostly wiped out by sahuagin that rightly viewed them as a threat, had never heard of Blibdoolpoolp.

Cosmological Views

According to the Great Wheel cosmology, Blibdoolpoolp's realm was known as the Murky Depths, located in the Elemental Plane of Water. Its waters churned and swirled based on her emotional state. The realm was kept surrounded by giant primitive crustaceans in an attempt by the Sea Mother to convince herself that her powers had not diminished.[8] Visitors to her realm who could not breathe underwater were granted that ability by the deity herself, a boon which also put them immediately in her debt.
In the World Tree cosmology, Blibdoolpoolp's realm was located in the Fated Depths, in an enormous, spherical temple resembling the moon that drifted through its fiendish waters. It was home to fiendish crustaceans and her kuo-toa petitioners and servants.

Worship

Worshipers Blibdoolpoolp's only worshipers were the Kuo-toa , whose priests ran most of their civilization. Her kuo-toa priests kept large black pearls and giant crustaceans in their temples, looking for changes in the pearls' coloration or in the animals' activity that indicated favorable omens. Priests from different settlements collaborated with each other to ensure their mutual defense, and were mandated to immediately drive away any illithid settlers found close to their homes. Rituals Lobsters were one of Blibdoolpoolp's preferred offerings and were regularly sacrificed to her. As a scavenger goddess, she also appreciated offerings of personal objects that were discarded and later recovered. Regurgitation at her feet was seen as a sincere show of faith, practiced regularly by her more devout followers. The most commonly held ceremonies to Blibdoolpoolp involved the drowning of humanoids. Worshipers requested favors from the goddess by offering copious amounts of gems and pearls. Larger amounts had a better chance of winning the Sea Mother's favor, so an offering of about 100,000 gold pieces worth of gems (or 50,000 gold pieces worth of pearls) would be considered adequate.

Priesthood

Blibdoolpoolp's priests conducted constant sacrifices in her name in ceremonial drowning pools, usually choosing of captives and slaves, although kuo-toa perceived to be mad or defiant could also be sacrificed. The duties of the archpriests involved communication with outsiders, judging criminals, conducted rituals during breeding seasons, and the growth/culling of fingerlings.