In summary, the Mechanical Race created the Destruction Core and derivative Destructive Spiritual Energy Essence from the converted Dimensional Infection Entity.
Later, this Destructive Spiritual Energy Essence became part of the Mechanical Enlightenment Nerve's content.
These Destruction Enlightenment Nerves, carrying part of the Dimensional Infection power, naturally lead to infection when implanted into ordinary organisms.
The Mechanical Race probably sees the infection process as a process of assimilation.
Once assimilation is complete, these dimensionally-infected organisms are sent to the mechanical spiritual creature conversion facilities, becoming what Chen Ming saw.
Fortunately, after second conversion, the remaining Destructive Spiritual Energy Essence is merely Spiritual Energy Essence, no longer having any dimensional infection's corrosive power.
Otherwise, Chen Ming would still have to worry about the dimensional infection marking issue.
