After Xu Qing upgraded the failed Mother-Child Nine Spirit Box to Level 10 and raised his Life and Death Law to Level 20, he noticed a connection forming between the two.
To be more precise,
his awareness began after he recorded the 'Life and Death Law' and the 'failed Mother-Child Nine Spirit Box' in his Encyclopedia of All Things.
One had to understand,
this connection was meant to subtly alter and influence Xu Qing's mind, eventually placing him under the control of the Mother-Child Nine Spirit Box and turning him into a slave, a Puppet.
This ability was similar to the Level 30 Celestial Bridge Pill and the Level 20 Transcendence Pill that Xu Qing had upgraded before; both of those Elixirs could also alter a being's mind.
However,
the effects of the Level 30 Celestial Bridge Pill and the Level 20 Transcendence Pill, which Xu Qing upgraded using the Encyclopedia of All Things, were far more powerful than those of the Life and Death Law and the Mother-Child Nine Spirit Box.
