However, once the creatures of the underworld are summoned, they can only fight for them for a limited time before being forcibly sent back to the underworld.
The more powerful the underworld creatures, the more precious the offerings required to summon them.
In the beginning, there were even some novice necromancers who, after summoning overly powerful underworld creatures, had their spiritual power and magic drained, leading to their death or turning them into idiots.
In addition, after paying a great price, one can contract with some undead from the underworld, instead of relying entirely on the rarity of the offerings and the necromancer's luck each time an undead is summoned.
These contracted undead usually reside in the underworld. Whenever necromancers need them, they can summon these contracted undead to fight for them.
After making a pact with the spirits of the underworld, necromancers not only no longer need to offer sacrifices when summoning spirits, but their spirits can also evolve into more powerful beings in the underworld after being nurtured by them.
Of course, there have also been cases where necromancers, after going bankrupt, finally managed to contract a powerful undead.
However, the spirit he contracted was torn apart by other spirits in the underworld, and his own soul also suffered some damage as a result.
Even so, some incredibly lucky necromancers are able to form contracts with powerful undead in the underworld even when they are still very weak.
The combat power of the undead summoned by necromancers is fully representative of the necromancer's combat power, which is why many magic apprentices still tirelessly pursue the seemingly shortcut path of becoming necromancers.
Due to a combination of factors, the Feathered Race has defeated several relatively weaker members of the Hundred Races Alliance over the years, making them vassal races of the Feathered Race.
A century ago, the orcs launched another war against the human's Bloodbath City. This war was initiated unilaterally by the orcs, and the demon race did not participate in the war between the orcs and humans.
Shortly after the war began, an order came from the Holy City of the Human Race, instructing Blood War City to relocate its people who had gradually expanded to the western continent of Tianyuan Continent over the years back to Blood War City or the eastern continent of Tianyuan Continent.
Afterwards, the human race relied on the city to the west of Bloodbath City, which had been continuously reinforced over the years by countless human array masters, weapon refiners, and rune masters.
The city walls, layered with powerful formations and restrictions, blocked the orc army's advance outside Bloodbath City, preventing them from crossing it.
The city wall to the west of Bloodbath City has now reached a height of tens of thousands of meters, and contains defensive measures that have been continuously deployed by countless human masters over the years.
The countless arrays and restrictions above include anti-air, spatial isolation, spatial defense, energy defense, material defense, soul defense, energy superposition, indestructibility, material reflection, energy reflection, connection to the earth's veins...
After the human race deployed their colossal warships, some tens of thousands of meters long, or even hundreds of thousands of meters long, the vast and fearless orc warriors were utterly routed under the weight of these weapons of war.
The commander of this orc army, the lion-man chieftain who had already passed the nine heavenly tribulations, and the grand marshal of the orc empire, Rhine, looked at the human's indescribably impregnable city walls.
Looking at the Orcish Empire's warriors, who had already suffered heavy losses, and the large number of human warships floating above them, they had no choice but to issue the order to retreat.
After the Orc Empire suffered a crushing defeat and lost a large number of warriors, Grand Marshal Rhine was given a title by the gossipers within the Orc Empire—the Invincible Grand Marshal.
Within the Heavenly Dao Space of the Heavenly Origin Sacred Realm, Yuan Hao watched as Hao Tian served him a cup of Enlightenment Tea, brewed with pure source energy from the tender leaves of a fully mature, top-grade innate spiritual enlightenment tree.
He withdrew his thoughts from swimming freely in the ocean of various Great Daos, so that the Heavenly Origin Sacred Realm could advance better in the future and not waste billions of years in vain by being stuck at a bottleneck. Instead, he focused on comprehending the various Great Daos in detail.
Yuan Hao took the Enlightenment Tea handed to him by Hao Tian, took a small sip, and a sliver of clarity flashed through his complex and chaotic thoughts.
With a thought, Yuan Hao dispelled the chaotic thoughts in his mind that had become due to his distraction in trying to comprehend the various branches of different Great Daos and the different directions within those branches.
After carefully sensing the current situation of the Tianyuan Sacred Realm, he muttered to himself, "Has the number of intelligent beings and the scale of powerful individuals in the Tianyuan Sacred Realm reached a critical point?"
Miaoshuwu
------------
Chapter 111 The Corrosion of the Abyss
According to Yuan Hao's perception, with the current number of living beings and the strength of the powerful beings in the Tianyuan Sacred Realm, if we add the countless ghosts and spirits in the Underworld, as well as the more than a thousand powerful ghost immortals, it has already fully met the standard for advancing to the Middle Thousand World.
Even in some of the Middle Thousand Worlds, the number of experts who have reached the fourth and fifth levels of the Transcendent Realm is far less than that of the Tianyuan Sacred Realm at present.
Over the years, while traveling through the void, the Heavenly Origin Sacred Realm has been incidentally devouring some small worlds or planes that are on or not far from its path.
Today, the Tianyuan Sacred Realm's subordinate worlds already contain more than ten small worlds and over a hundred planes.
Within these small worlds and planes, there are more or less a few or dozens of demi-planes, or even some world seeds that have not yet formed demi-planes.
In these subordinate worlds, various superior things and knowledge are gradually digested and absorbed by the beings in the Tianyuan Sacred Realm through the continuous influx of ascendants who ascend into the realm.
The giant warships possessed by the human race, and the various defenses on the walls of Bloodbath City, largely draw upon the knowledge brought from the lower realms by the ascendants.
In particular, several small worlds that resembled universes and were technologically advanced were opened up by Yuanhao after he infused them with spiritual energy and created ascension channels to the Heavenly Origin Sacred Realm.
Through the ascendants who ascended from these universes, the various races of Tianyuan began to rapidly develop their own technology.
Furthermore, through the combination of various extraordinary powers and precious knowledge, a unique extraordinary technology belonging to the Tianyuan Sacred Realm was formed.
However, among the technologies that have appeared in the Tianyuan Sacred Realm so far, only a few have greatly improved the living standards of the people.
Basically, 90% of technological achievements are used in warfare. They are either incredibly powerful weapons of war or new types of protective shields with outstanding defensive capabilities.
As for applying technological achievements to various forms of enjoyment, or using them to further develop the various arts that have already appeared in the Tianyuan Sacred Realm, making it easier for the people to obtain spiritual satisfaction.
Currently, none of the high-ranking members of the various Tianyuan clans have ever entertained such thoughts, and the overall turbulent environment of the Tianyuan Holy Realm does not allow them to have such ideas.
After carefully investigating all the information within the Tianyuan Sacred Realm, Yuan Hao then sought to select a suitable coordinate from the world coordinates that the World Tree had discovered over the years.
In order to make the process of Tianyuan Sacred Realm advancing to the Middle Thousand Worlds even more perfect, Yuan Hao wants Tianyuan Sacred Realm to devour another world, whose world level is at least no lower than that of a Lesser Thousand Worlds.
Only in this way can the Heavenly Origin Sacred Realm take a big step forward above the level of the Middle Thousand Worlds after entering the Middle Thousand Worlds, thus shortening the distance to advance to the Great Thousand Worlds.
Instead of spending a very long time accumulating resources to meet the various conditions for advancing to the Great Thousand World after the Heavenly Origin Sacred Realm has advanced to become a Great Thousand World, it is no longer necessary.
"Oh! Interesting!"
Among the world coordinates and general information about the corresponding worlds that the World Tree has explored over the years, Yuan Hao discovered a somewhat special world.