YMMV / Y'all of Cthulhu

• Complete Monster: Colin Brock was a suave and charismatic sociopath who led a notorious band of outlaws in the mid-to-late 19th century. Learning of the Great Old One Mgepgathg, Brock decided to unleash it from its interstellar prison—which would prove disastrous for humanity—in exchange for being rewarded with godhood. Converting his gang into a cult, Brock performed horrific experiments on infants and animals to create a host that Mgepgathg could use as an avatar. When Sheriff Clay Bishop defected to keep his daughter Ellie—one of the prospective hosts—safe, Brock dispatched gunslinger Lance Kilkenny to hunt him down and kill him. As an adult, Ellie rallied a posse—including a repentant Lance—to avenge her father, locating Brock in the mining town of Olvido, New Mexico, which he had taken as his base of operations, brainwashing the citizens into becoming cultists. Brock succeeded in capturing Ellie and killing all but one of her traveling companions, undercover government agent Johnny Rhodes. Despite interference from Nyarlathotep and a benevolent Dark Young of Shub-Niggurath, Brock sacrificed the remaining inhabitants of Olvido to turn Ellie into Mgepgathg's avatar and apotheosized into a Humanoid Abomination.