The cooldown time of the Ten Thousand Sword Jue is very fast, but the dominant-level Demon Shadow BOSS in front of him, this kind of skill similar to "invincible", the cooldown time seems to be very fast, after it collapses into a black mist, all damage will be immune, which really makes Song Jian feel a headache, after all, if you want to cast the karmic fire red lotus sword array, you have to consume all the sword qi, and although the speed of the sword qi recovers quickly, the upper limit of Song Jian's sword qi value is too high, and it will take at least forty seconds or more from the consumption to the full value.

"The real karmic fire red lotus sword formation, there are four stages in total, I don't believe that this state of yours can last so long!" Song Jian squinted his eyes and stared at the rolling black mist in the distance, countless spirit swords continued to slash around it, and at the same time, a huge karmic fire red lotus sword array slowly emerged, enveloping this black mist.

After turning into a black mist, although it was immune to all damage, there was no way to attack, which also gave Song Jian a chance to observe it and discover its weaknesses.

Soon, the first and second stages of the Karmic Fire Red Lotus Sword Formation had already passed, and more than ten seconds had passed, and the moment the sword qi palm print appeared, the tumbling black mist movement suddenly froze, and it seemed to have been affected by something.

At this moment, the sword qi palm print, which shrouded a radius of tens of meters, was pressed down at an extremely fast speed, instantly suppressing this black mist to the ground.

However, it didn't take long for wisps of black aura to slowly float out from the fingers of the sword qi palm print, and condensed into a ball in the air again.

Although this blow still did not cause him damage, the movement of the black mist tumbling had a noticeable slowness, which could be seen clearly even with the naked eye.

"It's still a ...... that plays a role in it," Song Jian said secretly in his heart.

At this moment, the sword qi stone tower had also been quickly condensed, and when the black mist had just condensed, the stone tower fell heavily.

A terrible scream came out from under the stone tower, the seven-story stone tower, each layer of the tower door suddenly opened, the light in the tower bloomed, a strong suction, from the stone tower door of each layer, there was a sharp whistling sound around, the wind swept, and the black mist that had just overflowed from the bottom of the tower was divided into seven strands in an instant, surging towards the seven tower gates.

The black mist was quickly sucked into each layer by the sword qi stone tower, and the seven black mist constantly changed various shapes in the air, including phoenixes, giant bears, turtles, and tigers condensed by the black mist......

Each shape only existed for less than a second, and then it collapsed into a black mist, which was sucked into the sword qi stone tower, and the black mist behind it continued to condense and form, mountain foxes, wild wolves, and even elves, humans, in just a few tens of seconds, there were dozens of shapes recognized by Song Jian alone.

"Shouldn't this guy be able to change a shape every time he casts a skill similar to invincibility, or can he cast a skill similar to invincibility every time he changes a shape?" Thinking of this, Song Jian couldn't help but wipe a cold sweat.

If his guess was correct, if he wanted to kill this dominant-level boss condensed by countless demon shadows, he would have to consume it and change every form before it could be killed.

If that's the case, then fighting it will be a nightmare for anyone.

It didn't take long for all the black mist to be suppressed by the sword qi stone tower, and each layer of the seven-story stone tower was lit up, and it could be seen that the black mist was constantly changing into the shape of various creatures on each layer of the stone tower, constantly roaring and roaring, crashing into the tower door and walls of the stone tower, but every time it collided, it would inspire countless sword qi, crisscrossing and shutting in the tower, and the creatures formed by the black mist were re-stirred into pieces.

The Sword Qi Stone Tower only existed for less than ten seconds, and after confirming that it could indeed suppress these black fogs, the Stone Tower began to slowly disappear, and at this moment, it also means that this Domination-level BOSS has been suppressed by the Stone Tower, as long as it waits for a while, it will be swallowed by the Sword Qi Stone Tower, turning into the proficiency of Ten Thousand Sword Techniques.

"This is equivalent to suppressing the temperament domination-level boss at the same time, this proficiency is enough for the Ten Thousand Sword Technique to be upgraded to another level." A smile of surprise appeared on Song Jian's face.

Now if you want to increase the level of the Ten Thousand Swords, you need at least an epic skill book, so using the skill book to increase the level of the Ten Thousand Swords Recipe has become very cost-effective, so it is better to use the method of suppressing the boss to increase the proficiency.

It's just that this method is also extremely limited, the selected BOSS must have a certain strength, and it can't be killed by Wan Jian Jue before the fourth stage is triggered, the sword qi stone tower, and it can't be too strong, if it can't even be suppressed by the sword qi stone tower, it obviously can't be swallowed.

This time, being able to "eat seven monsters with one monster" has far exceeded Song Jian's expectations, even if this boss is a little tricky, but the ending is not bad.

When the sword qi stone tower completely disappeared, Song Jian waited quietly for a while, for a long time, the girl's voice did not appear, Song Jian shrugged his shoulders, pretended not to care, and walked towards the passage.

Just after he left, the girl's translucent voice appeared where Song Jian was standing before, looking at Song Jian's disappearing back, with an inexplicable look in his eyes.

"I didn't expect that this guy was even more powerful than I imagined...... "The girl whispered to herself: "This sword technique of his made me feel the breath of the Sword Sect, could it be that this guy is still a disciple of the Sword Sect?" How is this possible! ”

At this time, Song Jian, full of joy, quickly passed through this long passage, and at the end of the passage, a dazzling red light bloomed, as if there was a pile of raging flames in front of him.

After getting closer, Song Jian realized that this place was really a flaming hell, and the environment was similar to the abyss hell, almost exactly the same as the previous fifth-level abyss dungeon.

As far as the eye can see, there are a total of nine volcanoes, each of which is an active volcano, with thick smoke billowing out, magma constantly gushing out of the crater, ravines all over the ground, and large and small magma rivers, dividing the entire land into fragments!

"This, how is this possible!" Song Jian was dumbfounded, although he had not entered the Abyss Fortress, but he also knew that the Abyss Fortress evolved from the Abyss Replica was nothing more than a bridgehead for the Abyss Invasion, the entire castle was divided into three layers, the bottom layer was the Abyss Passage, which was connected to the Abyss Hell, and after a while, a large number of Abyssal Creatures would pour out, and there were long and long segments during this time, according to the different levels of the Abyss Fortress, the higher the level of the fortress, the shorter the interval, and the lower the level, the longer the interval.

The top layer is the Guardian Crystal, and if you want to completely destroy the Abyss Fortress, you must enter the top layer and break the Guardian Crystal.

However, when entering the top layer and destroying the crystal, the bottom deep passage will immediately open the limit, and endless abyssal creatures will swarm in to prevent the enemy from destroying the guardian crystal.

You must know that even the lowest-level third-level Abyss Fortress has a defense of 30 million points for the Guardian Crystal, and if you want to stop the abyssal creatures while destroying the Guardian Crystal, without a strong elite team, you will definitely not be able to complete the task of destroying the Abyss Fortress.

But no matter what, there would be no such scene in the Abyss Fortress, and Song Jian wondered if he had been accidentally teleported to another place when he passed through the passage.

Just when Song Jian was puzzled, nine volcanoes erupted at the same time, and after a deafening roar, the earth cracked, revealing a huge hole with a diameter of more than 100 meters, and a strong abyssal breath emanated from this cave, accompanied by countless roars similar to beasts, as if there were endless monsters swarming out of the cave, Song Jian's face suddenly changed.

……