As Sun Yunyou's soul returned to the Ten Thousand Soul Banner, it also brought Shen Siyuan two strands of Merit as a gift.
Shen Siyuan used one strand to repair the Ten Thousand Soul Banner.
He stored the other strand for backup and did not use it to cultivate the Great Arhat Eighteen Forms or to connect with Earth Mother's Primordial Magnetism again.
The reason for not using it is because at this stage of cultivating the Eighteen Forms, the benefits gained from using Merit were too low.
Moreover, after assimilating Primordial Magnetism into his body, it significantly aids the cultivation of the Eighteen Forms, so he decided to cultivate on his own for a while instead of using Merit to advance his cultivation progress.
As for Earth Mother's Primordial Magnetism, it's easier to understand; this strand of Primordial Magnetism is like a seed, more is not necessarily better, but it needs to be continuously nurtured within the body to fully grow.
