Hel

Lady of Pestilence
Alignment: Neutral Evil
Domains: Air, Animal, Death, Earth, Fire, Plant, Water
Symbol: A face, black on one side and white on the other
Garb: Druidic garb of a midnight black and snow white
Favored Weapon: poisoned dagger or sword
Form of Worship and Holidays: Rites to Hel are practiced by her worshipers during blights and plagues, likewise sacrifices are made to her by fearful non-worshipers to stave off plagues and illness.
Typical Worshippers: Diseased and disease-causing creatures, evil humanoids, evil druids, women, bards. Hel is known to spread disease, pestilence and plague with the wave of her hand. Any living thing in her presence withers and dies. She appears as a strange gaunt woman of both jet black and blankest white. Diseased creatures worship her. It is said a strange cult of druidic ghouls and mummies worships her in a secret temple hidden from the knowledge of mortals, spreading their foul diseases in secrecy. Several sects of evil druids dedicated to Hel plague the land, summoning swarms of vermin and causing disease in living things. She cares for nothing other than the spread of death. Oddly, some evil bards worship her. She resides on a plague-ridden plane in Hades.
Hel is known to spread disease, pestilence and the plague. She does not differ much from the other pestilent entities of Abbadon, save for two details. The first is that she is worshiped by many farmers and druids to ward away disease. The form of the worship usually involves nailing dead or dying sacrifices to wooden poles at the borders of one's domain. If the sacrifice sickens or rots in a particularly putrescent manner, then Hel is said to have accepted the sacrifice, and the land will be spared her plague.
For this reason, her holy symbol is a half-blackened skull symbolizing both her dualistic nature of disease and warding.
The second detail, and why she was for a time widely worshiped in the Stoneheart Valley is due her origin. Hel rose to power as Kel was struck down. Kel was the goddess of protection, and Hel too could be considered to have a protective streak.
Some would have you believe that when Kel was struck down, her essence became twisted and blackened and emerged as The Lady of Pestilence. For this reason, many goodly priests and prophets have spoken of striking down the church of Hel to restore Kel to her rightful place.
But who can say if these stories hold any truth, or whether it's just an accident that these two opposing gods have such similar named.
-Lecture at the Fallen Sword