The Mother and Child Ghost Heads are very special, a rare type of Combined Magical Artifact.
Because their forging requires Yin Attribute spiritual materials, they were considered outright Devil Sect artifacts in the ancient Cultivation World seven thousand years ago.
Li Mo acquired it at the Treasure Pavilion.
The Treasure Pavilion never sells low-value Magic Artifact Catalogs to the public and usually gives them away partially. Li Mo obtained it by chance.
The price of Yin Attribute spiritual materials is steep, and the Mother and Child Ghost Heads were unappealing, so in the end, Li Mo took them since the artifact type was uncommon.
The so-called Combined Magical Artifact refers to several Magic Artifacts interrelated, controlled by a core artifact with multiple auxiliary artifacts assisting.