A primal beast created before Akasha that possessed the potential to revise history. Having attracted Astral attention because of his skills that defied logic, Siwen was used as the base and retained his sense of self after the transformation. Astral researchers thus deemed this primal a failure of a weapon, removed its core, and sealed it away. However, upon discovering that Taishang Laojun could still affect its surroundings, they cast it into the Crimson Horizon.
