With the deepening of the soul power, Lin Xiang also felt more and more difficult, and the surging soul power hit the soul mouth, making Lin Xiang very uncomfortable.

When the soul mouth in the sea of knowledge is impacted by the soul, the soul mouth will expand, but when the soul mouth is larger, it exceeds the limit that the sea of knowledge can bear, and the sea of knowledge will be unstable.

Seriously, it may even collapse the sea of consciousness, the soul dissipates, and the body turns into an empty shell.

And Lin Xiang's sea knowledge, although it stretches for more than 100 million miles, is not reliable, and it can be found from the previous fox easily dived into Lin Xiang's sea of knowledge.

Fortunately, although it is not possible to know the sea, the strengthened Lin Xiang's soul is still very strong, entrenched in the center of the sea of knowledge, and Lin Xiang in the outside world is constantly transmitting soul power.

Soon, Lin Xiang felt that the transmission of soul power could not keep up.

"Whether it's big enough or not, I'm going to fight it!"

Gradually, the pressure of the crystal nucleus on Lin Xiang's soul power became greater and greater, and it was really difficult for Lin Xiang to move forward by half a step.

"Give it a try!"

Lin Xiang temporarily stopped the input of the soul and let it freeze in place, and he stuffed the soul into the soul mouth in one go.

Casually control the soul to move closer to the center and compress it, leaving some space.

Then fill it up with soul power, and then add soul power.

In this way, the consumption of Lin Xiang's soul power is actually quite large.

After repeating it a few times, Lin Xiang felt that he really couldn't compress his soul power.

"Boom!"

Lin Xiang released the compressed soul, and all the souls seemed to have broken through the cage and scattered in all directions.

Some of those souls rushed to the outside and inside of the soul mouth, rushed to the souls outside, and even helped Lin Xiang's soul power move forward a little more.

However, without the supply of soul power from behind, Lin Xiang's soul power was pushed back again, and even retreated a little more than before.

Fortunately, the soul power is not completely disobedient, and there is still a part of the soul pressed on the soul mouth, compacting it and leaving more space.

The expansion of the soul mouth will also lead to the expansion of the strength of the soul mouth, because the soul mouth is compacted.

However, if the soul mouth is larger, under the same force, the "soul pressure" in the soul mouth will decrease.

Soul pressure refers to the amount of soul power within a certain range of the soul mouth after it is filled.

Generally, the soul of a newborn person is "one", and as the soul becomes stronger, the soul pressure will become larger, and it will begin to change from "one" to a higher soul pressure.

Of course, by compressing the soul power, the soul pressure can also be increased.

Soul pressure also affects the output of soul power, and the greater the soul pressure, the greater the output speed of soul power.

For example, when Lin Xiang expanded his soul mouth just now, the soul pressure was very high, so high that the soul mouth was compacted, leaving more space, and the soul pressure was also reduced.

Although increasing the soul mouth will reduce the soul pressure, generally speaking, the soul cultivation will first compact the soul mouth, and then increase the soul pressure.

Because when enhancing the soul mouth, the soul power is completely vertically applied to the edge of the soul mouth, just to expand the soul mouth.

And when the soul power advances from the inside out, the soul pressure is particularly large, and the strength of the soul mouth is not enough, the soul power may pierce the soul mouth diagonally, causing "soul piercing".

Soul piercing will bring great soul pain, and when the soul power passes through here, it will often divert into it, resulting in blockage, and in severe cases, it will further aggravate the soul piercing, and when the soul piercing is serious to a certain point, it will cause the collapse of the soul mouth, and then the soul will be blocked, the soul can not have contact with the external body, and the outer body will become an empty shell, and the inner soul will be trapped in the sea of consciousness until death.

Therefore, Lin Xiang is still very cautious about the soul, and he strictly follows the methods that his predecessors have explored to expand the soul mouth.

Compared to the expansion of the soul mouth, Lin Xiang actually wanted more than the increase in the strength of the soul mouth, because in that case, as long as there was a strong enough soul power to support it, it could produce a lot of explosive power, and the surging soul power burst out, who could match it?

"It's very helpless. ”

With the expansion and strengthening of the soul mouth, Lin Xiang's soul power output has become closer and smoother, but fortunately, Lin Xiang's soul power has reached the soul realm, and his soul power is still enough to reach the maximum soul pressure that the soul mouth can bear.

The soul mouth and soul pressure have increased, although the increase is not much, but the gain will be larger and larger.

Not only that, thinking of this, Lin Xiang's mind popped up with many new tricks.

Knowing the sea, just like a semicircle, knowing the sea ground, is the cross-section of the circle, the place beyond the sea is surrounded by chaos, in the place where the sea of knowledge and chaos come into contact, there is an invisible barrier, the soul cannot go out, there is only one place, that is the soul mouth.

Once the soul power enters the soul mouth, it will appear in the physical body, and the soul can also enter the sea of consciousness through the physical body.

And in the sea of knowledge, the power of the soul is like dirt and dust.

When it becomes dirt, it can be piled up to block other soils, and once compacted, it becomes hard soil that can withstand more pressure.

And when it turns into dust, it can drift with the wind until it floats to the place where Lin Xiang wants it to go.

Lin Xiang can pile the soul at the soul mouth, and then compress it, artificially reducing the size of the soul mouth, so that when there is a soul flowing out, the soul pressure will increase involuntarily, so that the soul pressure can be increased to the extent that the soul mouth can withstand the maximum soul pressure, and the soul mouth can be expanded by the way, and it will not cause damage to the soul mouth, killing three birds with one stone!

Lin Xiang called this method: "Gathering Souls!"

And when you find the right amount of soul to stack, increasing the soul pressure to the maximum will be faster than the soul output speed of the soul mouth full soul pressure under normal circumstances!

Lin Xiang tried, he piled the soul power at the soul mouth, and then compacted it.

He didn't lay too much, but only one layer, just a little experiment, and if it worked, then continue to thicken.

At the beginning, the experiment was very successful, Lin Xiang increased the soul pressure until it was close to the limit, and there was nothing abnormal in the soul mouth.

After that, Lin Xiang thickened the soul gathering and raised the soul pressure to an unprecedented height, and finally, Lin Xiang successfully raised the soul pressure to a height beyond the limit.

And the soul mouth has also been enlarged a little.

But this disadvantage also becomes apparent.

First of all, these are Lin Xiang's soul powers, which have a certain compatibility, and they are easy to gather together, if Lin Xiang doesn't pay attention to control, it is easy to cause blockages inside.

Secondly, the inner wall of this soul mouth has no ups and downs, there is no way to jam Lin Xiang's soul gathering, once the soul pressure is too large, Lin Xiang can not continue to control the soul gathering at all, the soul gathering will be compressed harder, squeezed out from both sides of the soul mouth, if it comes out from the side of the sea of knowledge, it is okay, you can control it at any time to restore the original state, once it comes out of the body, the light compacted soul explodes, causing damage to the body, and the heavy disturbing soul that comes out of the soul mouth has a lot of soul pressure, causing a soul explosion, causing greater damage to the body, and even giving the soul mouth " Explode".

"Okay...... This is really too difficult! I guess it's hard for me to complete it now, I'd better refine the crystal nucleus first, and the rest will be completed by gathering souls, and by the way, I can find out if there are any other problems. ”

......

"This Lin Xiang, how far has he gone on the road of martial arts, he is thinking about creating his own exercises, and his brain is bold, it's really interesting!"