Olhydra
Mistress of Dark Water

Elemental Princess of Evil Water Creatures [Demigod]

Symbol Cresting wave  
Alignment Neutral Evil  
Priest Alignment NE, CE, LE  
Plane Water  
Worshippers Cultists, evil water creatures, water elementals  
Race Human, sahuagin, possibly others  
Sex Any  
Attributes N/A  
Proficiency Groups Priest, General  
Bonus Proficiency Swimming 2
Preferred Weapon N/A  
Allowed Weapons As for normal cleric (sahuagin may use racial weapons instead)  
Armor Any, any shield  
Primary Sphere Elemental (Water) 4
Major Spheres All, Charm, Guardian, Healing, Protection, Weather 50
Minor Spheres Creation, Divination, Necromantic 15
Additional Spells Magic Font (5th level), Plane Shift (5th level) 1
Abilities
  Normal priestly followers (no followers if sahuagin) 5
  +2 on saving throws against water-based spells and effects (including liquid poisons) 5
  Access to non-unique Wizard water spells 25
5th level Water breathing (at will, sahuagin gain the ability to survive on land indefinitely instead)
10 (continuous) + 3 (P3) - 2 (5th level) - 1 (2 powers) = 10
10
9th level Summon 12 HD water elemental (1/week)
3 (1/week) + 11 (P7 x 1.5) - 4 (9th level) - 1 (2 powers) = 9
9
Limitations
  Reduced spell casting (1 less spell of each level, no 6th or 7th level spells) -15
  Talisman (the holy symbol must be bound to the priest in a special ritual, only one such symbol may be posessed at any time) -8
  Spells are granted through direct communing with Olhydra, who may deny or grant them as is her whim. She cannot, however, read minds with greater skill than the ESP spell allows. -3
Raiment White or blue robes, bare head  
Animal Octopus  
Holy Days High tide, human sacrifice to the waters  
Notes
As a demigod, Olhydra's priests are based on 100 points, rather than the standard 120
Olhydra has great enmity with Imix, Elemental Prince of Fire
Background
Olhydra has but a small human following on Oerth, owing to the efforts of the cults of Elemental Evil and the Elder Elemental God. She does, however, have a strong following among evil elemental spirits of all forms, and even amongst the sea devils of Oerth's seas (though Sekolah ruthlessly purges any cultists found amongst her people). Her human priesthood is not particularly well-organized or magically empowered, but they nonetheless hold more than one coastal community under their sway. Her priests are most common along the shores of the Wild Coast and the Hold of the Sea Princes.
Sources
Fiend Folio, pp. 32-33 (original source)
Manual of the Planes, p. 49