D is for Deumus

Unlike many fiends, Deumus is openly worshiped as a goddess. This feat was achieved through feigned benevolence and deceit. While her worshipers see her as a motherly goddess, she is actually a wicked devourer of souls. Her true nature is known to certain circles of occultists, who call upon her aid in exchange for souls.

Deumus
Armor Class: 5 [14]
Hit Dice: 8
Attack: Bite or Claw (1d6)
Special: See Below
Move: 12
HDE:  10, 1,100

Like many demons, Deumus is immune to nonmagical weapons. Can cast 4 1st level cleric spells, 3 2nd level clerics spells, and 1 3rd level cleric spell per day. Clerics worshiping her false goddess identity can receive 1st and 2nd level spells from her.

Summoning/Bargaining Ritual Modifiers: Sacrifice (+1 per HD of creature)

Potential Boons: Ability to cast 1st or 2nd level cleric spell once per day, healing, fertility

Potential Banes: occultist grows horns, occult's teeth fall out and four hooked teeth replace the lost teeth, occultist's legs turn to giant chicken legs, forfeiture of soul upon death