Mystics

Adept (Creature -1), Cult Leader (Creature 7), Cultist (Creature 1), Demonologist (Creature 7), False Priest (Creature 4), Harrow Reader (Creature -1), Necromancer (Creature 5)

Most rituals have a simple gp cost and skills. But what if a desperate NPC is willing to offer something darker, such as lives, souls, or worse? Such a nefarious ritual uses a normal ritual as a baseline, but the DCs and proficiency requirements might be reduced or waived entirely, as might any gp cost.