The soul forces of the Supreme Neo-Demon and Neo-Demon's Ancestor erupted as an Astral Qi mantle and black hole manifested.
The path other life forms take was not enough to engrave the laws of a super universe more potent than those of the Prima Universe. They needed to tap into a force whose nature stood above a normal universe's matrix.
Luckily, both the All-Devouring Domain and Astral Destroyer Godslayer Mantle were capable of inner cultivation and could work as conduits to guide the Prima-Eldritch Universe Final Battlefield's laws into their bodies.
The Law Engraving Rank comprises six engraving stages: Flesh Engraving, Muscle Engraving, Bone Engraving, Marrow and Blood Engraving, Viscera Engraving, and finally Consciousness Engraving.
Every improvement during Rank 5 enhanced an individual's attunement with the laws and allowed their True Soul to grow, purifying and enhancing their soul force.