This martial arts secret technique and the method of practicing the first-grade divine formation were indeed the inheritance that Heidao obtained from a relic when he was in the Shenwu World. The inheritor was a quasi-god who was not much worse than the Nine Nether Dragon Emperor. Even though Long Yu had mastered 80% of the Nine Nether Seals, he really had no way to directly detect the existence of the relic.
Only when Black Knife entered, the intention left by the inheritor was activated, wanting to pass the inheritance to Black Knife.
However, there was still no suspense, as Long Yu directly blocked the black knife's strongest attack. After practicing the martial art of Boundless Grasp to perfection, a new skill, Boundless Seal, was derived.
The Seal of the Boundless was a move that was similar in effect to the Dark Star Confinement that Long Yu had practiced before. It could not only be used to confine and seal the enemy, but also to protect oneself.
When used to seal the opponent, the Boundless Seal can make it completely impossible for the opponent to escape. Long Yu even felt that even the spatial divine text disintegration effect of his Nine Nether Path was useless.
This is because the composition of the Boundless Seal is not a spatial divine text of any attribute, but was selected by Long Yu.
Just like the Boundless Grasp, Long Yu can use the revelation-level Nine Nether Divine Script to activate the Boundless Seal, so that the Nine Nether Divine Script constitutes the Boundless Seal.
No matter what power Long Yu uses to activate the Boundless Seal, the effect is similar. However, if different powers are used to activate it, various special effects can be added.
For example, Long Yu is now in tune with the shadow attribute divine text to the twelfth level, which means that any shadow attribute divine text he comprehends will have a strong corrosive effect.
This effect can also be seen in the Seal of the Boundless, but its effect is not very great. After all, the Seal of the Boundless is not an offensive magical power.
When Long Yu faced the powerful attack of the black knife, he finally broke through the martial art of Boundless Grasp to the perfect realm, and derived the Boundless Seal.
As a defensive measure, the defensive ability of the Boundless Seal definitely exceeds any means that Long Yu has practiced before!
The black knife attacked with all its strength and suddenly burst out with a destructive power ten times greater than before, but it still failed to shake the Boundless Seal in the slightest. This showed how strong the defense of the Boundless Seal was.
Of course, this was also because Long Yu used the Boundless Seal this time, which directly exploded his defense power by three times, so it was normal that the black knife could not break through.
While Heidao was shocked, Long Yu did not give the other party any chance.
"Boundless Seal!"
Long Yu shouted loudly, and the Boundless Seal was used again. The Nine Nether Divine Scriptures surged out, sealing Hei Dao inside.
Surrounded by the Boundless Seal, Long Yu could no longer feel the aura of the black knife within the Boundless Seal, and at this time, he could begin to stack the Crazy Battle Force.
The effects of the Mad God's Descent are still continuing to accumulate, but the effects are not particularly obvious. The power of the Mad War God Text, which has increased over time, has almost stagnated after increasing tenfold.
And now, Long Yu trapped the black knife in the Boundless Seal, like a dark sphere covering the black knife. Long Yu directly swung the Crazy War Fist Cannon towards the Boundless Seal!
With each and every firing of the Crazy Fighting Fist Cannon, the Crazy Fighting Force on Long Yu's body continued to accumulate, layer after layer, extremely quickly. However, at the same time, the Boundless Seal was also quickly destroyed by Long Yu.
He used this move to seal his opponent's black knife and at the same time superimpose his own Berserker Force, killing two birds with one stone.
Since Black Knife was constantly trying to use his methods inside the Boundless Seal to destroy the mark that imprisoned him, the Boundless Seal was being destroyed very quickly.
After only five or six breaths, the Boundless Seal was finally broken by the joint attack of both sides. However, at this moment, the mad fighting force on Long Yu's body, plus his previous state, had accumulated to more than twenty layers!
Coupled with the effect brought by the descent of the Mad God Long Yu, the power of his own Mad War Divine Text has been increased by more than thirty times!
Such a terrifying increase in power made Long Yu look like a mad god descending to the earth. The pressure alone was enough to make the black knife, which had just been freed from the bondage of the Boundless Seal, feel an extremely strong sense of oppression.
"This power..."
An expression of disbelief emerged on Heidao's face. When he was sealed into the Boundless Seal by Long Yu, Long Yu did not have such strong power.
Now that he had come out, he discovered that Long Yu's aura and pressure had increased tenfold, which undoubtedly made Hei Dao feel a little unbelievable.
Black Knife, had previously used the sixth level of martial arts secrets to increase his own strength by almost five times, but now Long Yu directly increased the power of his own Berserker Divine Scripture by more than thirty times!
This is obviously not the same concept. Perhaps if Black Knife can improve the secret martial arts technique to the ninth level, the effect can be comparable to the Berserker Celestial Body that Long Yu is practicing now. But obviously, Black Knife cannot do that now.
To improve the secret martial arts after the sixth level, one must absorb the power of creation. But the most important thing now is that the black knife cannot get any creative things, let alone absorb the power of creation.
Comparing the two, Long Yu is better.
"Berserk Fist Cannon!"
Long Yu threw a simple punch, and the black knife, which had just been freed from the Boundless Seal, subconsciously wanted to dodge when it encountered Long Yu's punch.
It’s a pity that the power of Long Yu’s punch increased, and the speed also increased by more than thirty times. In just a blink of an eye, he arrived in front of Hei Dao and punched him in the chest!
This punch almost took Heidao's life. He was blown away by the huge force. The destructive power of the Mad War Divine Text was one of the strongest attributes of the Divine Text. At this moment, Long Yu's punch caused serious damage to the meridians in Heidao's body.
Heidao fell heavily to the ground, causing sand and rocks to fly everywhere. He vomited blood and the severe injuries he suffered made it almost impossible for him to stand up again.
Long Yu stepped forward and soon came in front of the black knife.
"What do you think, Black Knife? You are no match for me."
Long Yu said calmly with a victorious smile on his face. Black Blade was seriously injured this time. Although it was just a Berserker Fist Cannon, this punch, which had more than thirty times the power of the Berserker Divine Scripture, was enough to cause Black Blade to suffer heavy damage.
Heidao was unable to stand up, but he could still speak, but his speech was intermittent: "I... I am indeed not... not your opponent... But one day..."
"Since you have admitted it, just follow me for now. Whether you can surpass me in the future depends on how hard you work."
Long Yu's lips curled up slightly: "At least now, you are mine, work hard, anyway, I will not treat you unfairly. When we get there, I will provide you with enough creations, and even cultivation resources that you can't imagine, at least so that you can step into the Domination Secret Realm in a short time."
As Long Yu spoke, he threw a healing pill into Heidao's mouth and asked him to swallow it.
The medicinal power of the healing pill soon began to radiate, gradually repairing Black Knife's damaged flesh and meridians, and the recovery speed was extremely fast.
Long Yu asked this connoisseur, "Can you teach me your martial arts secret method that increases the power of shadow attribute divine texts? In exchange, I will also teach you a very good martial arts secret method."
Long Yu wanted to use Balance Control to exchange with the other party. To be honest, it was not a loss for Long Yu, and it was definitely not a loss for Hei Dao either.
But what Long Yu didn't expect was that this boy actually refused!
"I won't accept it. You asked me to teach you my martial arts secrets. I can't do it... You know, my biggest goal is you. How can I be willing to let you become stronger?"
Black Blade's injury improved, and he gradually flew up from the ground, then came to the opposite side of Long Yu, with fanaticism in his eyes: "I will defeat you, so I will not give you these things I got."
"No problem."
Long Yu narrowed his eyes slightly. He didn't expect that Black Knife was so competitive against him that he was willing to give up the opportunity to increase his strength in order to defeat him.
Apart from anything else, if Heidao could practice Long Yu's secret martial arts method of balanced control, his overall strength would definitely improve a lot.
Of course, in comparison, if Long Yu obtains the opponent's martial arts secret method to enhance the power of shadow attribute divine texts, his own frontal combat power will also be greatly enhanced.
It was because Heidao knew how important the secret martial arts technique he practiced was to Long Yu that he was unwilling to teach it to Long Yu.
Otherwise, if Long Yu becomes stronger, it will be even more impossible for him to catch up with and defeat Long Yu. After all, there is already a huge gap between the two sides. Unless Hei Dao catches up with Long Yu in martial arts realm first and then surpasses Long Yu, he will never be Long Yu's opponent in the future.
In any case, Long Yu finally subdued Black Blade, and then let Black Blade continue to stay in the New Wu World. When Long Yu planned to return to the Void Galaxy, he let Black Blade leave the New Wu World and go to the Void Galaxy.
As for now, if Long Yu releases Black Blade, it will be of no use at all, and he is also afraid that this guy Black Blade will slip away accidentally.
You know, this kid is not a peaceful guy. He is very likely to do something like suddenly slipping away. After all, for Hei Dao, the biggest goal is to defeat Long Yu.
Long Yu didn't know what hatred or resentment Heidao had towards him, but since the other party regarded him as a target, his desire to become stronger should be very strong.
Such a guy would definitely be a great help to the Void Galaxy.
For the time being, Long Yu doesn’t know whether there are other means passed down in the inheritance obtained by Hei Dao. If so, this kid’s combat effectiveness in the future may not always be inferior to Long Yu.
Of course, the possibility of Black Blade surpassing Long Yu is extremely low. After all, the Nine Nether Dragon Emperor's inheritance and the Nine Nether Prison Stele that Long Yu obtained are existences that even the Nine Nether Dragon Emperor cannot understand.