Pretty cool, imo.
As God created Man in His own image, so too did Lucifer create the Ujahwek to prey upon the fleshed manifestations of his enemy.
For years Randall Montgomery swung a sledgehammer in a coal mine, as if pitting himself against a mountain would replenish a soul depleted by the Civil and Indian Wars. With the onset of black lung and middle age, he journeys west to visit an old army buddy before starting life anew. Instead of a friendly reunion, he finds a burgeoning terror last encountered in North America by early humans. A threat bent on claiming all who draw breath in the Wyoming Territories.
For ages the dark spirits of the once-feared Ujahweks have waited, ravenous and expectant ... until a banished female shaman of the Blackfoot tribe is drawn to Skull Cliff in the Owl Creek Mountains. The shaman embraces the spirit of Xotaena, Ujahwek high-priestess, and unleashes the means to resurrect the unholy species. Immediately they hunt their prey: humans. The Ujahwek high-priestess selects Randall Montgomery for possession with the soul of her mate. To survive he must battle in both the physical and mental realms, or get dragged into the depths of humanity lost.