That very night.
Ninth Immortal City, City Lord's Mansion.
Li Chang'an sat cross-legged, controlling the formation as he silently sensed the power of heaven and earth.
Ordinarily, one could only barely command a portion of the power of heaven and earth after reaching Spirit Transformation, but the Tier 5 formation had allowed him to experience this feeling ahead of time.
As long as he remained within the formation, he was equivalent to a Spirit Transformation cultivator.
"Lock!"
With a thought, he used the power of heaven and earth to condense chains after chains, locking down the Spiritual Energy of heaven and earth in every direction.
In an instant.
The Spiritual Energy throughout the entire Immortal City plummeted, as though it had entered an age of declining cultivation.
"This is Seal Heaven Lock Earth. It truly is extraordinary."
"If used well, it could lock the development of an entire world to death."
With a casual wave, Li Chang'an dispersed the chains and restored the Immortal City's Spiritual Energy to normal.
Afterward.
He tried several more methods unique to Spirit Transformation Heavenly Lords.
Experiencing such power and methods in advance would be greatly beneficial when he broke through to Spirit Transformation in the future.
Although the Life-and-Death Soul-Extinguishing Formation had reached Tier 5, it had not given birth to a Formation Spirit. Thus, all of its power was firmly under Li Chang'an's control, available for him to wield as he pleased.
After using it for a while, Li Chang'an suddenly received a message from Zi Xi.
"Fellow Daoist Li, I have passed the assessment and become a disciple under Heavenly Lord Wuxiang. I will soon head to Eighth Immortal City to guard it alongside one of my senior sisters."
"Holy Maiden, did Heavenly Lord Wuxiang make things difficult for you?"
Li Chang'an