Therefore, they must be ruthless and let them fight to determine the winner.

When hungry young mastiffs find barking useless, they reveal their beastly nature. Start eating everything around you that will keep you alive.

At that time, the tearing and killing began.

A litter of young mastiffs will be torn apart for more than half a month. A litter of young mastiffs usually has six to seven, or even more.

They can live for days every time they kill a sibling and eat each other's corpses.

Every time the young mastiff can survive, it is sure to be the winner.

After round after round, victory, and survival, their strength will become stronger and stronger. In the end, only one baby boiled survived. When it kills the last brother or sister, it's almost a full moon.

It can already come out of its nest to hunt some young animals on its own.

Such as mountain rats, rabbits, birds, etc.

Even, when it is hungry, bugs are its food.

It is precisely this cruel tearing and killing that has been experienced since childhood, and this hellish growth environment, will make them stronger and stronger. More and more ruthless.

Those who died, were dogs.

Only this last one to survive is a mastiff. It's the king.

Only then can they have the strength to compete with other beasts and survive in the dangerous jungle.

Chu Feng chose the royal vein, and also borrowed from the mastiff's child-rearing method. It's just that he will definitely not destroy the Nine Dao Sword Veins, but by weakening them, he will observe the most potential and outstanding Nine Yang Sword Veins.

Then use the alien fire and elixir to support it and help it be promoted to the king's line.

After the nine sword veins were suppressed by the cold attribute elixir, they were all instinctive resistance.

Chu Feng closed his eyes and carefully felt every sword vein in his body.

"This one located above the dantian is too weak!" "At the beginning, it was extremely weak, and the resistance was also very soft.

Chu Feng could clearly feel that the sword qi circulating within this sword vein had become nearly twice as slow.

"At first glance, it's a knockout item!" Chu Feng was the first to knock it out.

Next, Chu Feng focused his energy on the other eight sword veins.

In the process of this observation, as time passed, new sword veins were constantly eliminated by Chu Feng.

After about an hour or so, there were only two strongest sword veins left, and they continued to be observed by Chu Feng. They are almost the same as each other.

Although the sword qi inside has been greatly affected, it is obviously stronger than other sword veins.

After another hour of observation, they still did not distinguish between the superior and the inferior.

"Huh, why is this weakest sword vein still the same?" Chu Feng casually glanced at the seven sword veins that had been eliminated.

As a result, he was surprised to find that the first sword vein that he had eliminated had still not changed after such a long time. It was still in the same state as it had been, and the sword qi inside had not continued to slow down.

It's incredible.

Judging from its performance at the beginning, even if the sword qi in this sword vein stopped circulating, Chu Feng would not be surprised.

The other sword veins, including the two strongest sword veins that had been observed, the sword qi in them was constantly being reduced and weakened. Only the weakest of the Dao is unusually strong.

is like Xiaoqiang, who can't be killed, and always maintains a tenacious vitality.

"Because I was so arbitrary, I almost missed your best royal vein! Thankfully, I didn't make a big mistake. ”

Chu Feng felt secretly glad that he was ready to choose this sword vein above the dantian as the king vein.

To be on the safe side, he observed for another hour or so, and re-observed all the sword veins that had been eliminated.

The sword qi in the other sword veins has been severely weakened. Even those two strongest sword veins were not spared.

On the contrary, it is the weakest sword vein above the dantian, and the latecomer is on top, and it has become the strongest sword vein.

And, it's always strong.

"That's you!"

After Chu Feng selected the most potential royal vein, he took out a red elixir from his arms and put it in his mouth. As the potency of the elixir dissolved, a trace of red-hot energy surged in the body.

Just now, in order to select the royal vein, the negative effect of taking that cold pill was quickly eliminated.

When the nine sword veins in his body returned to normal, Chu Feng was almost breathing.

He mobilized the Nine Yang Alien Fire in his body and began to consciously strengthen the sword vein he had chosen. It's certainly not enough.

A variety of pills that have been prepared to impact the Sword Saint realm have long been prepared.

I saw him take out a jade box, and when he opened it, there was a crimson pill the size of a baby's fist.

A fire Jiao loomed inside the elixir.

It kept writhing, its teeth and claws, and the flames rose on the surface of the pill.

This pill is a six-grade fire Jiao Dan, and it is also one of the most expensive pills among the pills that Chu Feng refined this time.

Its function is also to strengthen the sword veins and help one of them metamorphose.

Originally, it was best to need a fire dragon pill of more than seven grades.

Chu Feng has a Nine Yang Alien Fire, which can cooperate with the Fire Jiao Pill, and the effect will never be worse than the Fire Dragon Pill.

"Goo-dong!"

The Fire Jiao Pill was swallowed by Chu Feng in one gulp.

I saw it turn into a fire Jiao and burn all the way down Chu Feng's throat.

"Hmm......"

Chu Feng's face showed a painful expression.

No matter how painful it is, you must grit your teeth and carefully guide the fire Jiao to approach the chosen sword vein. Because it is like a magnet, no matter which Jiuyang Sword Vein it encounters, it will immediately attach to it.

Under Chu Feng's guidance, it finally approached the selected sword vein.

Brush!

When it was still some distance away, it was already out of control, and it suddenly attached itself to the sword vein.

The next thing to do is to help this sword vein with all your might, absorb it, and merge it with the sword vein.

This point is difficult for Chu Feng.

Using the Nine Yang Alien Fire, assisted from the side, plus the Supreme Secret Room he was in, he had sufficient aura.

It only took less than two days to successfully help this sword vein absorb that fire Jiao.

On this sword vein, there is an extra fire Jiao pattern.

It looks like a warrior, and after being promoted to general, he is dressed in handsome armor and armor.

"Whoa~!"

When this sword vein was transformed and strengthened, Chu Feng just moved his mind. There was a large amount of sword qi pouring into this sword vein, both in terms of the capacity of the sword qi and the activity of the sword qi, it was far superior to other sword veins.

"Boom ......"

Chu Feng's other sword veins were actually trembling, and they all rang out in unison, responding to that royal vein.

Not only that, but the sword qi circulating within them must be controlled and controlled by the royal vein.

It's like a general, in charge of his soldiers.

"Haha! It worked, I finally succeeded in completing the first step. It can be regarded as half a foot stepping into the realm of the Sword Master. Chu Feng couldn't help but smile happily.