This was because Realm Demons 'comprehension of the Great Dao laws was inferior to human cultivators.
Even the Great Dao nomological laws left behind by Demon Lords were of little value to Nascent Souls.
However, the Origin World where the Qingqiu Demon Kingdom was born was different. It was left behind by a Perfected Immortal-level Realm Demon.
A Realm Demon at the level of a Perfected Immortal was three major realms higher than a Nascent Soul cultivator. No matter how low a Realm Demon's comprehension of the Great Dao was, it was still far from what a Nascent Soul could compare to.
Which cultivator wouldn't be tempted by such a treasure?
"Unfortunately, once the Great Dao nomological laws in the Origin World are taken out, they will eventually dissipate into the world. Even a Realm Demon at the level of a Perfected Immortal is no exception."