The strength of the Book of Fusion is that it does not need to fuse the aspect of the skill at all, and it can directly increase the level of the main skill set, even if the secondary skill is completely opposite to its attributes;

Theoretically, Song Jian can fuse all his skills and directly pile up a full-level skill, but if he can't determine the quality of the main skill, he can only reduce his strength;

"Set 'Formation' as your primary skill!" Song Jian directly pulled the "Formation" skill into the main skill slot, and for the skills to be consumed, Song Jian's eyes swept through the skill column, and finally selected the two skills of "Magic Rune Description" and "Magic Rune Array";

The magic rune drawing skill is only level 3, but the magic rune array skill has been upgraded to level 7 by Song Jian, and these two skills can be transformed into a large number of proficiency for the "formation" skill upgrade;

After Song Jian dragged these two skills into the secondary skill slot, he was immediately prompted by the system;

System: Do you merge the skills "Magic Rune Array" and "Magic Rune Trace" with the skill "Formation"? Yes/No

System: After selecting fusion, the "Magic Rune Array" and "Magic Rune Description" will disappear, and there is a certain chance to merge into a new skill, and there is a certain chance to strengthen the "Formation" skill.

Fusion!

Song Jian immediately clicked the "Fusion" button;

The Book of Fusion bloomed with a white light, the two skills in the secondary skill slot slowly disappeared, and the "Formation" skill in the main skill bar bloomed with a brilliant light.

System: Your skill "Formation" is upgraded from intermediate to advanced;

System: Your skill "Formation" is enhanced; Shorten the formation time by 50%, increase the power of the formation by 30%, analyze the formation +2, detect the key nodes of the formation +3, and comprehend the formation +5;

A smile appeared on the corner of Song Jian's mouth, he had already planned to fill in a few more skills, but now it seems that he no longer needs it.

"Sure enough, using skills with similar attributes to fuse can still improve the success rate." Song Jian said secretly in his heart.

The shortening of the formation time and the increase in power are not very effective for Song Jian now, but the analysis of the formation and the detection of key nodes are too important.

In fact, these two attributes are to be used in conjunction with the later "Formation Comprehension", and when encountering a formation that has never been contacted, there is a certain chance that this formation will be learned.

But now for Song Jian, he doesn't need to learn the Qingyun Sword Formation, he just needs to break the Qingyun Sword Formation;

It is always much easier to destroy than to build, and the more complex the formation, the easier it is to be affected by some key nodes, thus causing the instability of the formation;

It's like pushing dominoes, just a slight movement in one place can affect the entire array.

After the "formation" skill was fused, a huge flow of information instantly rushed to Song Jian's brain, but with the support of Song Jian's powerful spiritual attributes, he only felt a little dizzy, and after a while, he completely comprehended and digested all this information;

At this time, Song Jian looked at the Qingyun Sword Formation above his head, and suddenly the context was much clearer;

"The power of the mountain range that can mobilize the entire mountain peak, the Qingyun Sword Formation, is really extraordinary." Song Jian couldn't help but admire.

The higher the level of the formation, the more clearly Song Jian could see the extraordinaryness of the Qingyun Sword Formation, and his admiration for Liu Qingyun also emerged from the bottom of his heart.

Liu Qingyun is amazingly talented, and he really deserves to be a character who created a sect with the power of one blow;

But the more this is the case, the more Song Jian wants to get rid of him, not only because of the task requirements, but most importantly, if he has a grudge against such a person and is worried about him, Song Jian may not even be able to sleep well at night.

"Although this sword array is mysterious, I don't need to destroy the entire sword array, I just need to cut off the connection between the sword array and Qingyun Peak, so that it can't use the power of the mountain range!" Song Jian said secretly in his heart.

At this time, the abyss demon lord, the abyss aura in the sky has been shattered by the Qingyun Sword Qi, covering an area that is not even half of what it was before, and if it continues like this, it is only a matter of time before it is defeated.

"Damn, as long as I am given a few more days, I will be able to recover my strength at the peak, you are a small human being, you can't be my opponent at all!" The Abyss Demon Lord roared loudly;

Once it recovers to the third-order strength, no matter how powerful the Qingyun Sword Formation is, the Abyss Demon Lord can break it with brute force, and when the time comes, the entire Qingyun Peak can be smashed by it with one palm, and with the help of the Qingyun Sword Formation of Qingyun Peak, it will not be taken into account at all.

"Your existence, I have already passed the book of the Flying Sword and informed the several major sects around the Qingyun Sword Sect, it won't be long before the news of an Abyss Demon Lord will spread throughout the entire continent, and you will never have time to recover to peak strength!" Liu Qingyun's face was pale, controlling the Qingyun Sword Formation consumed his great energy, he only hoped that the Abyss Demon Lord would be able to retreat in the face of difficulties, and give him and the Qingyun Sword Sect a day or two of respite, when the time comes, several surrounding sects will come to support, and after a while, when those big sects with third-order combat power and fourth-order combat power arrive, a small Abyss Demon Lord will soon be suppressed;

At this time, the Abyss Demon Lord had already retreated, the Qingyun Sword Gate was a hard bone, there was no need for him to die at all, as long as he went to find one or two more human towns and sacrificed their flesh and blood, he could quickly recover his third-order combat strength;

"Human, we might as well retreat for the time being, at most in two or three days, I will be able to ......" The voice of the Abyss Demon sounded in Song Jian's ears;

"Hold on, this sword formation, I will be able to crack it soon!" Song Jian directly interrupted the words of the Abyss Demon Lord;

The Abyss Blade was stunned for a moment, and said in disbelief: "How is this possible, this is ......"

"I know what I'm doing, you just have to remember that you have to fight him before I say it's okay to retreat!" Song Jian said categorically;

"But ......"

"Do you want to taste the feeling of your soul being torn apart again?"

"......, well, do as you ask!"

Under Song Jian's strong insistence, the Abyss Demon Lord could only continue to fight helplessly, but deep in his heart, he couldn't help but let out a roar and roar;

"Damn human, wait, one day, I will tear your body to pieces and let your soul be roasted under the flames of the abyss for 10,000 years!"

Just as the Abyss Demon Lord was struggling to fight against the Qingyun Sword Formation, Song Jian, who had been observing for a long time, finally had his eyes lit up, and a smile appeared on the corner of his mouth;

"I found it!" Song Jian muttered to himself;

……