The Legend of the Otherworld Demon God

For quadrillions of years, the Otherworld has stood firm amid both serene beauty and blood-soaked carnage, drawing together the very essences of countless realms. Within its bounds converge the soft, yielding yin of the Nether Realm; the pure, refined spiritual force of the Soul Realm; the sparse spiritual energy of the Spirit Realm; the diverse immortal auras of the Immortal Realm; the profound mysteries of Formation Realm arrays; the enigmatic power of the Dao Realm; the supreme martial techniques of the Battle Realm; the balanced dual arts of the Yin-Yang Realm; the mutually generative and counteractive forces of the Five Elements Realm; the instinctive killing arts of the Underworld's dark laws; the slow, harmonious Buddha essence of the Buddha Realm; and the awe-inspiring, world-shaping might of the Demon Realm. Naturally, it also houses the extraordinary supernatural abilities unique to the Otherworld itself. Yet with such an overwhelming assembly of power gathered in one place, the question lingers: what exactly is it that they must face?