The origin of the Sacrificial Array must begin with the tale of the Beastman Clan.
The Beastman Clan is a race of half-beast, half-humans, inherently mighty beings capable of morphing into human or beast form. Given their innate beastly nature from their Spiritual Beast heredity, they are naturally bellicose and relish in waging wars across various planets.
During an incidental encounter, while waging war upon an obscure Star Domain, the Beastman Clan stumbled upon an Array Formation Book, and within its pages, it described the peculiar and malevolent Sacrificial Array.
Since then, the people of the Beastman Clan began delving into the study of the Sacrificial Array until they ultimately succeeded in mastering it. Henceforth, whenever the time neared for the Clan Leader's expiration, they would choose an external domain planet to entomb their leader in ice, thereby evading the reincarnation cycles of the Heavenly Dao.