The most important factor in maintaining an oasis is the vegetation.

Only with a certain scale of vegetation can an oasis be sustained, but the foundation of oasis vegetation is still water.

The water source of an oasis, a gathering place for the Sha Clan, is the most fundamental and crucial element.

If an oasis loses a sustainable water source, no matter how much or how large the vegetation is, its disappearance is just a matter of time.

Therefore, what Ye Zhen wanted to do for the Black Sand Tribe before leaving was focused on the water source.

Only by genuinely considering the Sha Clan people and the Black Sand Tribe can Ye Zhen accept their dedicated Power of Belief with peace of mind.

This is Ye Zhen’s true intention, and it’s also Ye Zhen’s conscience.

The water source of the Black Sand Tribe is actually just an underground river that flows here, which is the foundation the tribe depends on for survival.

Water sources are generated by heaven and earth and require an extremely complex and complete ecological environment to produce a sufficiently stable water source.

Creating or increasing a water source out of thin air is impossible for Ye Zhen, let alone Dao Realm or Creation Gods.

What Ye Zhen can do is to stabilize and expand this underground river.

According to the chief of the Black Sand Tribe, Hei Mann, the flow of this underground river, which they call the River of Life, has decreased by more than half over the past century.

The population of the Black Sand Tribe has naturally been reduced by half, and its scale has changed from a medium-sized tribe to a small tribe, mainly due to the sharp decline in the river’s flow.

The reasons for the decline are simple: the protection from the Yidongqing Divine Tree has been continuously decreasing, evaporation has intensified, and the losses during the flow have greatly increased.

Various reasons have caused the sharp decline in the flow of the River of Life.

Ye Zhen’s gaze fell upon the Yidongqing Divine Tree.

The Yidongqing Divine Tree is actually a common evergreen shrub in the Yizhi Sand Sea that can withstand extremely harsh natural environments.

Not only is it extremely drought-resistant, but it is also very cold-resistant, making it very suitable for the extreme weather in the Sand Sea.

Moreover, the root system of the Yidongqing Divine Tree is extremely developed and grows in a tuberous form. Once it grows in scale, these root tubers will spontaneously tangibly intertwine tightly, like a natural underground wall that can solidify sand and conserve water.

Before the Yizhi Sand Sea Sky God emerged, Yidongqing was merely a Yidongqing, not the Sand Sea’s Yidongqing Divine Tree.

However, under the divine methods of the Yizhi Sand Sea Sky God, countless seeds of the Yidongqing Divine Tree were scattered, allowing the developed root systems and root tubers of Yidongqing to closely bind the riverbed and riverbank of the underground river, significantly reducing losses during the underground river’s flow.

Meanwhile, the surface above the underground river was also densely planted with Yidongqing Divine Trees, which not only greatly reduced evaporation but also solidified the sand and replenished the soil.

If a sandy area continually has a large number of Yidongqing Divine Trees growing, after decades of growth, the sandy land will be transformed into soil.

The oasis soil in the Yizhi Sand Sea today was all created after the Sand Sea Heavenly God Yizhi planted a large number of Yidongqing Divine Trees.

Moreover, the fruit of the Yidongqing Divine Tree can be pressed to extract sweet and high-quality oil, which once served as one of the primary sources of oil for the Sha Clan people and a trading commodity.

For the Sha Clan people, the Yidongqing Divine Tree is already considered a Divine Artifact, and the love for it can no longer be described with mere words. They use every effort to protect it and plant a large number of seeds every year.

However, this is precisely the downside of the Yidongqing Divine Tree.

For the Sha Clan people, the Yidongqing Divine Tree is regarded as a Divine Artifact, but its cultivation is extremely difficult.

Ordinary Sha Clan people may plant ten thousand seeds of the Yidongqing Divine Tree without a single one sprouting.

So far, only the Blue Robe Priests and the Sand Sea Divine Priest at the Yizhi Temple have the ability to successfully cultivate some seeds of the Yidongqing Divine Tree.

For instance, a typical Blue Robe Priest has a sprouting rate of only one-tenth for seeds of the Yidongqing Divine Tree, and this refers only to the sprouting rate.

The Yidongqing Divine Tree is very fragile before its roots penetrate the sand, and a strong wind might blow away countless seedlings.

Thus, within a month after sprouting, the Blue Robe Priests at the Yizhi Temple must continuously use Divine Arts to accelerate growth to ensure the survival of these Yidongqing Divine Trees.

Usually, planting ten thousand seeds of the Yidongqing Divine Tree, and managing to keep five hundred alive is quite remarkable, and only the top Blue Robe Priests can achieve this.

Typical Blue Robe Priests, if they manage to keep two to three hundred alive, are already doing well.

The demand for the Yidongqing Divine Tree in the Yizhi Sand Sea is calculated in trillions. Despite such a low survival rate, even if the Blue Robe Priests at the Yizhi Temple use Divine Arts to plant the Yidongqing Divine Tree every year, the number of Yidongqing Divine Trees in the Sand Sea is continuously decreasing due to reasons like human activity, consumption by other life forms, weather conditions, and various others, despite the Sha Clan people using all sorts of efforts to protect the Yidongqing Divine Tree.

It is precisely for this reason that the Yidongqing was dubbed the Divine Tree. In the Yizhi Sand Sea, only the Yizhi Heavenly God’s Divine Arts can plant and ensure the survival of this Yidongqing on a large scale.

Because of this, Ye Zhen based his ideas on the Yidongqing Divine Tree.

The choice that could benefit the Sha Clan people and also benefit Ye Zhen himself is rare.

Ye Zhen asked Hei Mann for a bag of seeds of the Yidongqing Divine Tree.

These seeds of the Yidongqing Divine Tree are abundant in the Yizhi Sand Sea. Almost every Sha Clan person treats them as a charm, hanging around their neck.

The seeds were shriveled and looked completely devoid of moisture. Biting into one made a crisp sound, as if biting into a stone.

It was hard to imagine that such seeds could survive when planted. However, to Ye Zhen, a Martial Artist proficient in Yimu Spiritual Power, the core of these rock-like seeds harbored an incredibly strong life force.

This life force was sealed away, and once activated, it would release an immensely powerful life force to maintain and protect the oasis here.

Casually tossing a few Yidongqing Divine Tree Seeds into the sandy ground beneath his feet, Ye Zhen used Spiritual Power to draw a little moisture from underground, infusing it into the depths of the seeds.

Ye Zhen could sense that the life force deep in the Yidongqing Divine Tree Seeds absorbed that bit of moisture, growing slightly stronger, but there was no sign of sprouting.

"Could it be that there’s not enough moisture?"

Then, Ye Zhen used Divine Sense to send in even more moisture.

But then, something strange happened.

The moisture Ye Zhen infused into the Yidongqing Divine Tree Seeds exceeded the size of the seeds, yet the seeds showed no sign of sprouting.

Ye Zhen realized it couldn’t be due to a lack of moisture.

A plant that required such a vast amount of moisture to sprout would have been eliminated by the Heaven and Earth Dao long ago and wouldn’t have survived to the present day.

"Little Demon, do you know what’s going on with these seeds?" Ye Zhen asked.

As a Tree Demon with the near-Royal Clan bloodline of an Ancient Giant Spirit Tree Demon, Little Demon should know about these matters.

"Father, these Yidongqing seeds have an internal self-protection barrier to survive in harsh environments. To make them sprout, you must first break this self-protection barrier," Little Demon replied.

"How do we break it?" Ye Zhen asked.

"It’s simple. Just send in a bit of Yimu Spiritual Power, which will automatically magnify the life force inside, causing it to break through the self-protection barrier on its own."

With Little Demon’s words, a bit of Yimu Spiritual Power entered a Yidongqing Divine Tree Seed, and almost instantly, the seed sprouted a tender shoot.

This process usually took several days, but was accelerated by the Yimu Spiritual Power.

As Ye Zhen sent a bit of moisture using Divine Sense, the roots of the Yidongqing Divine Tree Seed began extending rapidly into the ground.

Under the acceleration of Yimu Spiritual Power, root nodules quickly formed, merging into one unit.

To Ye Zhen’s senses, these merged root nodules had an impressive ability to retain water. If they could be controlled to grow near an underground river, they would offer substantial protection to it.

Moreover, after a while, the flow of the underground river would increase as losses were reduced.

However, the resources needed to grow a single Yidongqing Divine Tree were minimal.

But considering the demand, the numbers became terrifying.

Ye Zhen calculated that with his current Cultivation level, producing ten thousand Yidongqing Divine Trees a day would be quite an achievement.

And just the number of Yidongqing Divine Trees needed by the Black Sand Tribe could amount to millions or even tens of millions.

"Father, I am a Tree Demon and also the King of the Ancient Giant Spirit Trees. I possess divine arts to guide and command many Wood Element Life through the call of the Ancient Spirits.

If I use my power to guide and summon their life forces, I can produce more Yidongqing Divine Trees with much less effort," Little Demon suddenly said.

Ye Zhen was overjoyed at these words, "How much can you produce in a day?"

"At least ten times what you can produce, Father. And if I can receive your support, the numbers will multiply," Little Demon replied.

Ye Zhen knew that Little Demon would undoubtedly handle this task more easily than himself, but he didn’t expect the disparity to be so significant.

Now that this resource demand issue seemed to be resolved,

Ye Zhen immediately began preparing for the planting of these Yidongqing Divine Trees.

But the first batch of Yidongqing Divine Trees had to be planted around or above the underground river to utilize their enormous potential.

So, before planting, Ye Zhen needed to carefully survey and prepare.

Meanwhile, the Black Sand Tribe needed some time to prepare millions of Yidongqing Divine Tree seeds.

However, with just one order from Hei Mann, the chief of the Black Sand Tribe, the Sha Clan people eagerly gathered masses of Yidongqing Divine Tree seeds.

Over ninety thousand Sha Clan people of the Black Sand Tribe reconvened, each looking expectantly at the mountainous pile of Yidongqing Divine Tree seeds as well as Ye Zhen, whom they regarded as the incarnation of the Divine Envoy of the Yizhi Heavenly God.

But just at that moment, the chief of the Black Sand Tribe, Hei Mann, looked up at a burst of radiance streaking across the sky, his expression changing.

"Divine Envoy, someone from the Temple has arrived!"