The Blood Swamps

The Blood Swamps is the second level of The Ancient Gods, Part One, the first expansion for Doom Eternal. The level is set in the Blood Swamps, a fetid swampland in the bowels of Hell.

"With Samuel Hayden revealed as the mysterious Seraphim, the Slayer journeys into Hell once more to seek the resting place of the Father's essence. Only the creator of all things can save Urdak and repel the hordes of Hell. The mire of the Blood Swamps is littered with the corpses of countless dead who have tried, and failed, to reach the peaks of Ingmore's Sanctum where the Father's life sphere lies."

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Lore
The Blood Swamps extend for miles across Hell, ridden with disease and plagued by acid rain. In the center of the swampland, the Ingmore's Sanctum rises into the clouds as a solitary remnant of Hell's ancient past as the holy realm of Jekkad. From the sanctum, the Father once made decrees of wisdom and oversaw his many works. It is there, in the mausoleum of gods, that his life sphere is stored. The sanctity of the spheres is protected by an ancient ritual known as the Trial of Maligog.

During the Unholy Crusades, lone Night Sentinel warriors sometimes wandered into the swamps attempting to overcome the Trial and reach the rumored resting place of the Father. Argenta legends state that their spirits are bound eternally to the grounds of the Trial, waiting to witness it finally overcome.