When informed of the Demon Alliance's defeat, Xuan Tian Daozun had entertained thoughts similar to Xiao Fei's.
The Demon Alliance was at its weakest now, presenting the perfect opportunity.
However, as a Supreme expert himself, he understood the terrifying might of a Supreme being.
Any advantage the Human race held over the Demon Alliance could be nullified by a single Supreme expert.
Previously, he had an agreement with the two Supreme experts of the Demon race, which allowed for some mutual restraint.
But such agreements lacked significant enforcement power; they were utterly useless in times of existential crisis or when faced with immense personal gain.
The last time the two Supreme experts attempted to capture Xiao Fei, their efforts were thwarted by the other side.
"If you cannot find a way to restrain a Supreme expert, all your efforts will be in vain."
Facing Xuan Tian Daozun's concerns, Xiao Fei seemed prepared.
"For the hundreds of years the Demon Alliance has been at war with the Guiyi Realm, I have been observing.
I discovered that the Seventy-Two Earthly Fiends Formation, composed of Golden Immortals from the Guiyi Realm, possessed immense power and played a significant role.
I've been wondering if we could create a similar Golden Immortal formation."
Having witnessed the centuries-long conflict between the two major powers, his intelligence network had provided him with a thorough understanding of the methods employed by both sides.
Both factions had unleashed numerous eye-catching and powerful techniques on the battlefield.
In particular, the Guiyi Realm's Seventy-Two Earthly Fiends Formation, by simply organizing a group of Golden Immortals, could contend directly with Supreme experts.
Therefore, Xiao Fei had been contemplating the creation of such a formation himself.
"I have also heard of this Seventy-Two Earthly Fiends Formation; its power is indeed considerable.
However, we have so few Golden Immortals. If we were to deploy all of them in this formation to face a Supreme expert, what would we do if the Demon Alliance's Golden Immortals attacked?"
Xuan Tian Daozun's concern was not unfounded. The Human race currently had only about thirty-odd Golden Immortals in total.
To form a formation capable of confronting a Supreme expert, even with all thirty-odd individuals participating, would be a strenuous undertaking.
In such a scenario, who would then deal with the remaining twenty-odd Golden Immortals of the Demon Alliance?
"I have already made preparations to deal with the remaining twenty-odd Golden Immortals of the Demon Alliance!"
As Xiao Fei spoke, he produced a long, hard object from his robes.
It was the scepter he had seized from General Di Gou years ago.
"Dao Artifact!"
"You actually possess a Dao Artifact!"
At this moment, Xuan Tian Daozun and Zhu Yu both displayed expressions of astonishment.
Xuan Tian Daozun possessed a Seven-Colored Lotus Platform, which was also a Dao Artifact.
With this Dao Artifact, he had single-handedly resisted the combined assault of San Yang Mozun and Lei Peng Yaozun, managing to hold them off for a brief period.
Previously, the entire Human race had only this one Dao Artifact, the Seven-Colored Lotus Platform.
Xiao Fei had somehow acquired another Dao Artifact from somewhere.
"With the aid of this item, then there will be no problem!"
Upon seeing this Dao Artifact, Xuan Tian Daozun's doubts were completely dispelled.
"From now on, you shall arrange how we proceed. Once your plan is finalized, inform me."
Xuan Tian Daozun now placed his complete trust in Xiao Fei's plan, adopting the role of a hands-off manager and entrusting the preliminary planning to Xiao Fei.
Sometimes, living longer did not necessarily equate to knowing more.
Just as among ordinary mortals, an eighty-year-old elder was not necessarily smarter than a young person in their twenties or thirties.
At least in the matters of setting up formations and plotting schemes, Xuan Tian Daozun admitted he was inferior to Xiao Fei.
At times, he even felt that his many years of life had been wasted.
Fortunately, he possessed self-awareness and understood the principle of letting professionals handle professional tasks, not presuming seniority and acting obstinately simply because he had more experience.
Xiao Fei then discussed further details with Zhu Yu before returning to his own cave dwelling.
He intended to leverage his understanding of formations and, referencing the Guiyi Realm's Seventy-Two Earthly Fiends Grand Formation, design a new formation suitable for their current needs.
Simply copying the Seventy-Two Earthly Fiends Formation would not work, as he lacked the necessary number of Golden Immortals to deploy.
Xiao Fei returned to his spatial dimension and began to delve into the intricacies of formations.
Over the years, by utilizing the time dilation within his dimension, where time flowed hundreds of times faster, he had become a master in alchemy, artifact crafting, and formation arrangement, reaching the pinnacle of the Immortal Realm.
To create a new type of formation that could rival the power of the Seventy-Two Earthly Fiends Formation was by no means an easy task.
Xiao Fei spent over a decade pondering within his dimension, sketching tens of thousands of diagrams.
These diagrams represented his preliminary feasibility studies for formation designs.
He needed to find the optimal solution from these tens of thousands of variations.
"Han Yi, Han Er, help me gather 2000... bring all your personal guards."
Xiao Fei initially intended for these two to gather 2000 individuals to help him test formations.
However, considering their less-than-sharp minds and deficiencies in mathematical aptitude, he decided it was better to have them bring everyone.
Under Xiao Fei's extensive resource investment, Han Yi and Han Er had both cultivated to the Immortal Monarch realm.
It proved that as long as substantial resources were invested, even the most dull-witted could reach a high level of cultivation; cultivation had little to do with intelligence.
His giant army, after years of development, now numbered tens of thousands, led by Han Yi and Han Er.
The personal guards of these two alone numbered over 2000.
For the next period, Xiao Fei spent his days directing these over 2000 giant soldiers, arranging them into various formations.
This was to verify the formations' power, as well as their respective strengths and weaknesses.
Unsatisfactory formation diagrams were promptly incinerated.
Gradually, the thick stack of diagrams in his hands dwindled, leaving only a dozen or so.
These remaining diagrams represented designs that, after testing, exhibited distinct advantages in various aspects.
Some excelled in defense, others in offense, and some in illusionary capabilities, possessing numerous strengths but also significant drawbacks.
Looking at these dozen diagrams, he found it difficult to make a choice.
Any one of these diagrams, when used to set up a formation, would indeed possess formidable power.
At the very least, it could consolidate the strength of over thirty Golden Immortals, transforming quantitative changes into qualitative ones.
However, a formation composed of only thirty-odd individuals was only half the manpower of the Seventy-Two Earthly Fiends Formation.
Facing Supreme experts, this level of power was somewhat unsatisfactory.
Xiao Fei then spent several more years merging these dozen formation diagrams, eliminating their weaknesses and retaining their strengths, ultimately consolidating them into a single formation blueprint.