The Ten-Element cultivators were powerful, but compared to the perfection cultivators of this world, their numbers were small. The reason is simple: perfection cultivators have an infinite lifespan. Even though reaching the perfection stage is harder than reaching the Ten Element realm, they have the advantage in numbers because of their infinite lifespan. There are thousands of peak perfection cultivators, while there are only around 500 Ten Element realm cultivators in the whole elemental world.
Regarding lower-grade cultivators, though, elemental cultivators hold the advantage; there are over 100 million Nine-Element cultivators and many more Eight-Element, etc. When the elemental cultivators invaded, they didn't bring many lower-grade cultivators for one simple reason: when it comes to a battle between perfection and Ten- element cultivators, lower-level cultivators can hardly be of any help; at best, they could provide energy and act as a battery, but even then they would only be an inferior version to Element stones and big formations, such as Nine Element formation.
A war between high-level cultivators is incomparable with a war of mortals; in an ordinary war among mortal kingdoms, numbers would mean a lot; even older people can swing a sword and take the life of a strong soldier; but, in a war between peak perfection realm and Ten-element cultivators, even a billion Nine-element cultivators wouldn't be able to make a dent.
The difference of power among big realms only gets bigger; a nascent soul cultivator has to fear a hundred core formation cultivator's unified strength. However, as the realm increases, the difference in power gets more and more outrageous. Not even a Million Nine-element cultivators have a fighting chance against a peak Ten-element cultivator; the reason is actually not hard to understand; even the unified strength of a million Nine-Element cultivators can, at most, cast at the Ten-element level spell; after all, the peak of Ten-Element cultivators represent the peak strength; even one step further would be stepping into 10th rank; a million Nine-Element cultivators have to work so hard to just be able to case a single spell that is equal with what a Peak Ten-Element cultivator can cast easily in a moment. The same is true about perfection cultivators and soul transformation cultivators.
For perfection cultivators, their big weakness is their disunity; no single large association of perfection cultivators exists. They are all lone wolves who live alone. It's understandable; after all, as immortal beings who have lived for billions and trillions of years, they are obsessed with their very individualized endeavor in crafting their complete law. Associations and alliances won't help them.
On the other hand, in the elemental continent where Ten Element cultivators have limited lifespans, they know that they have very little chance of ever crafting a complete law, so they usually form alliances and remain in them. It seems counterintuitive; elemental cultivators have limited lifespans, so they naturally should have more urgency to craft their law. But in reality, it doesn't work like that; this case displays the difference in mentality between those with infinite and finite lifespans.
Perfection cultivators have an infinite lifespan; as a result, each and every one of them has a good chance of eventually succeeding in crafting a complete law. After all, they have so many years, so even if they move at a snail's pace, after countless years, they may finally be able to reach their goal. In their journey toward a complete law, any association that dilutes their individualized golden luck would only lower their success rate; it isn’t a help at all.
On the other hand, Ten Element cultivators, who have limited years to live, know that researching a complete law and crafting it is a pipe dream. Maybe the most talented, who have the world's blessing, may succeed, but for the overwhelming majority, the Ten Elements realm is their end. They know this the moment they break through; as a result of knowing this fact, they rely on other means, such as joining forces and alliances, to increase their strength.
Because of this, the perfection cultivators lack the equipment needed for collective battles, such as large formations and magic weapons. Of course, each perfection cultivator has a wealth of personal magic weapons, but those are unsuitable for a collective battle.
When the Elemental cultivators came, thousands of perfection cultivators noticed; only those too deep in their research didn’t notice it. After all, the movement was too big. But even though they noticed, they just observed from afar, not acting even as the Elemental cultivators set up their battle formations.
When it comes to defense or offense battles between large numbers of people, there is usually a coordinating force. Most people are selfish; most wouldn’t take up arms on their own and throw their lives to protect something far away from them, such as the borders of their country hundreds of miles away, where they may have never even visited. Of course, there are also many who would volunteer to do that, but even those who volunteer need a coordinator, commander, strategist, etc.
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Of course, people are willing to defend things they consider valuable; the number of people who would be wiling to defend a city they know would probably be higher than the number of people who are willing to risk their lives to defend a city they don't know or visited; the number of people people who are willing to defend their family is many times higher that the number of people who are willing to defend their country; there is a lot of other variables, such as their living conditions in the country, whether they are defenders or invaders; etc. It is all a balancing factor, with risk to life on one side and things they consider valuable on the other.
Among mortals, in long, drawn-out wars, relying on volunteers is impractical to defend a country from an invasion of strong forces. Of course, it's best to rely only on volunteers, but once volunteers die off, they resort to coercing people to 'volunteer' through social pressure or outright conscripting them, giving them a gun or sword, and throwing them in front of a cannon. That is inevitable. Advanced and late modern mortal cultures rarely use soldiers; there are long-range rockets and robots, making human cannon fodders useless in wars. However, conscription would happen for mid to low-grade modern, medieval, and less advanced civilizations.
But among immortal forces, especially high-level immortals such as perfection realm cultivators, forcing them to fight is just a dream, or rather, not even a dream; it is outside the realm of possibility. It can be said that mortals are far better than cultivators when it comes to mobilizing forces.
First of all, strong cultivators have high personal strength, which makes forcing them much more difficult; on the contrary, mortals are weak; forcing them is easy.
Second is mentality; mortals are, on average, far younger than cultivators, which makes them more naïve. For most cultivators, sects and even their own clans are mostly tools for advancing in their realm, obtaining resources, and increasing their strength. However, many mortals see their country, clan, tribe, etc., as more than just tools; they see them as something greater, maybe even more valuable than their own lives.
Moreover, mortals are much easier to coerce through social pressure, which is often harder to replicate among cultivators. For example, one technique is to label those who won’t 'volunteer' to throw their lives away for the 'greater good' of their clan/tribe/country as 'cowards,' 'selfish,' 'immoral,' etc. These social pressures work well among mortals but usually fail to work among cultivators, especially strong ones who have experienced the world for a long time.
A very strong force invaded their world, yet the perfection cultivators completely ignored it. Some even observed for a while and returned to their research, only keeping their divine sense on them.
This caused an awkward situation.
Elemental cultivators had prepared extensively, setting up many defensive formations and four large formations on high alert, yet there was not a sign of anyone trying to force them out. It was as if they were invisible; there was nothing besides a few glances occasionally.
When Firepower was here alone, hundreds of perfection cultivators, the most aggressive and daring ones, were chasing him. Now, those were caught by the guardian of light and dark inheritance, so naturally, the remaining ones are those who won’t care as long as their research is progressing fine.
Even if the last group of 350 perfection cultivators hadn’t been caught, it was doubtful that they would attack or even plan to attack the elemental cultivators. After all, even when it was hundreds versus one blood sea puppet, they still didn’t dare to attack and wanted to wait for at least 1,000 to gather. Now that the enemy has such a massive force, they wouldn’t risk it unless forced into a desperate situation. After all, even the slightest injury can delay them in their path to true immortality for an unimaginable number of years.
…
Firepower looked at the other 8 powers and said, "What should we do now?"
Even he was a little stunned; the last time he was here, he was brutally chased. Now, he would like to take revenge, but he couldn’t because nobody paid much attention to him, as if world invasion was an everyday occurrence.
In fact, suppressing the weak and avoiding the strong is very common; many chivalrous mortals see this as immoral, but this is extremely common among cultivators. Taking advantage of the weak is natural for them. Before, Firepower was one transmigrator chased by hundreds of perfection cultivators. He was weak, so they dared to chase him. But now, he is strong, so the perfection cultivators ignored him.
Icepower said, "We should negotiate. Nobody would benefit from a battle; we should get what we want through negotiations."
Another elemental cultivator, Positive Power, said, "Negotiate for what? With whom? I say let's start attacking sects and countries; let’s ignore perfection realm cultivators and conquer the rest of the world."
Negative Power nodded and said, "I agree with Positive that we should attack, but I believe we should also negotiate with perfection cultivators. After all, they occupy the best resource points and have the best cultivation techniques in this world."
The world has many long-extinct cultivation techniques, which are only in the possession of a single perfection cultivator whose force went extinct a long time ago.
After some time, they finally decided to hold off on attacking and first negotiate. After all, no matter how much they hate to admit it, the collective power of this world is much higher than the elemental world, which means winning what they want through negotiation is a big win for them.
As for how to send the letters, it is easy; their divine sense can cover the entire world, and they can teleport to the entire world, so they just wrote the letter and sent it through teleportation.