Few things could still disturb Gu Yuanqing's state of mind, but changes to North Spring Grotto-Heaven itself were certainly among them.
Imprisoned on a barren mountain all those years ago, he had only attained his present good fortune with this mountain's help.
It was Gu Yuanqing's greatest secret and trump card.
With the Primordial Divine Sect and the Ancient Realm threatening him from the sidelines, this change was undoubtedly good news.
Now a Void Immortal, his strength increased every day, but those improvements remained within the same realm. A qualitative change was difficult to achieve in a short time.
Once the grotto-heaven became a Small World, its own power would increase. Combined with his many empowerments, that would be enough to raise Gu Yuanqing's strength substantially!
Moreover... this was a marvel of heaven and earth, containing the mysteries of the Great Dao. Observing the transformation itself was a rare opportunity. It also closely resembled how a Void Immortal drew upon creation to attain the Immortal Path, making it a perfect reference against which to verify his own Dao Path.
For precisely this reason, Gu Yuanqing devoted more attention to North Spring Grotto-Heaven's changes each day.
He carefully contemplated every subtle change in the Extreme Yin-Yang Dao, observing how each one affected the entire grotto-heaven. Using this as a mirror, he adjusted his Heavenly Human World, then examined how those changes influenced his own Dao, even checking the changes they brought to his True Dao Source Seed.
An ordinary cultivator would never have dared to act as boldly as Gu Yuanqing.
Though these changes seemed minor, every one involved the foundations of the Great Dao. Tugging a single hair could move the whole body; even the slightest change might cause irreparable consequences.
Only because he was within North Spring Grotto-Heaven, with