Dahai replied to them very seriously: "It's true, but it's basically soy sauce, there's no way we're too weak now, you wouldn't be able to see us without Doctor Liu!"

Everyone looked at them seriously, and suddenly said together: "You are lucky, I hope we will work together in the future, welcome back!"

The students who were able to stay know how difficult it has been for everyone in the past few years, although there is competition, but the feelings of classmates are deeper.

There was not much time left, and Hao Yun watched everyone's practice, and then combined with himself to have some ideas and inspirations.

Regarding how to group the two-person cooperation project, since the three groups of them came back at the end, the people in the first and second groups have already been assigned these days, and the students in the group have already started to practice, so they can only choose within the team.

The four of them get together and discuss how to do the grouping.

Fei Fei is very popular, and everyone chooses her unanimously. Fei Fei was very moved, but she raised an important question, that is, how to cooperate, what effect can be produced, if it is just a simple trick, there is no bonus, or even irrelevant to each other, it is meaningless, so now it is not a question of who to choose, but how to match together, one plus one is greater than two.

This is indeed a big problem, and after Fei Fei finished speaking, everyone fell into deep thought. Hao Yun is currently cooperating with Quartz Sword and Dahai, but he has never cooperated with Fei Fei, he and Fei Fei are basically playing soy sauce in the previous mission, that is, when it comes to fighting with the big demon, Fei Fei is also playing, Hao Yun is still playing soy sauce, and only the action of pulling out the gun at the end is more chic. When Hao Yun thought of this, he realized that in fact, whether it was the fire crystal gun or the teleportation technique, he was a secondary character, and the real powerful output was not him, he felt so embarrassed! If it continues like this, it will be eliminated by the times. No, we have to find a way to do it quickly.

Hao Yun said to Fei Fei: "Fei Fei, can you tell me about your magic technique? The main thing is the attack technique, and the protection technique is probably not our three strong points." ”

Now it's Fei Fei's turn to be embarrassed: "I haven't practiced the attack technique much, because you are all aggressive, I think I can only help you strengthen the protection, now ask me if I have any attack technique, have you seen who I have attacked?"

"No, you attacked. Quartz Sword suddenly spoke, startling Fei Fei.

"Really, why am I not impressed? You won't say that I used a mallet to block the ice arrow, that is not an attack technique, it is essentially a block, and the effect is not good. ”

"No, there's a trick that feels pretty powerful. Quartz Sword denied Fei Fei's claims.

"There is a trick, but it is estimated that it is still a defensive trick!" Hao Yun also remembered.

Fifiqi: "yes, then hurry up, don't let me guess." ”

"It's the trick of wrapping the big demon with a branch, if it weren't for that trick to delay the speed and time of the big demon, it is estimated that the brick would have broken!" Quartz Sword announced the answer.

Fei Fei then understood, it turned out to be this trick, this trick is called tree control trick, is to use the characteristics of the terrain to control the trees, this trick can only be controlled in places with trees, if it is an open space, it is not possible, Fei Fei has no way to conjure a tree. And the power of this move mainly lies in the tree, if it is in the forest, the more powerful it is in the place where there are many ancient trees. At present, Fei Fei is in the late stage of foundation building, so the number of trees under control is limited, of course, it is also related to the size of the trees, and the larger the trees, the more spiritual power is needed.

Hao Yun thought about it carefully, and remembered that the big demon was blocked by the branch at that time, but the big demon shattered the branch as soon as it shook it, so the power was really limited. Unless there's a way to make the branches more resilient, that's a bit harder.

Hao Yun asked the quartz sword if there was a way to coat the branches with a layer of metal, and it didn't matter if they were thinner. Quartz Sword replied honestly: No. It turns out that although the gold cultivator can control the metal, there is no way to change the metal out of the natural world, after all, the metal element is not like the earth system in nature, the ground is full of soil, so the earth cultivator is easy to manipulate the earth element to change various things, such as stone shields, stone armor, stone spears, etc., and the earth cultivator himself does not conjure up the soil by himself, but controls it with the endless earth elements on the ground plus the spiritual power of the earth system. The same is true for this wood system, Fei Fei can't conjure trees, but she can perform various operations on trees that have already grown. Therefore, the gold system has always been the five element attribute with the highest physical attack power, not the highest protection, and there is no way for the gold system cultivator to directly conjure up an iron armor and gold armor, if there is this ability, the gold system is too invincible.

Hao Yun still didn't give up, and said that if there is metal powder, can it be done? Quartz Jian thought about it and thought that he could try it, but he felt that there would be no such coincidence in nature, there were trees and iron powder, unless it was a trap.

Fei Fei's eyes lit up, she has now learned the cage technique, this trick itself is a trap, it can be set up in a place where there is a tree to automatically activate, or she can carry some spirit seeds, of course, these spirit seeds must be refined, so that as long as they are scattered in the open space, within her control, she can use the wood spiritual power to urge the spirit seeds to grow up quickly at any time, and the cage technique can be stimulated. Therefore, this method is first-class for Yin people, especially in open space, most people may focus more on preventing air attacks, but will ignore their feet.

The problem with the cage technique is mainly due to the wood method, after all, it is difficult to find a plant in the spirit world that can match the toughness and hardness of metal. Therefore, the wooden cage, the cultivators of the high realm are not afraid of being shattered by a shock, the cultivators of the fire system are not afraid of burning it directly, and the cultivators of the lower realm are not afraid of metal weapons and the like, and it is a big deal to come out with a few more cuts. Therefore, there are only two ways, one is to find plant seeds that are not afraid of fire and are not afraid of cutting with knives, and the other is to find a way to coat the plants with a layer of metal. The four of them thought for a long time, and the sea sighed: It's so difficult!

As the days passed, the day of the exam was getting closer and closer, and their pairing still couldn't be done, who would match Fei Fei? Fei Fei meant, it's all right, anyway, matching with me is soy sauce. The three men looked at Fei Fei and couldn't help sighing, the old man Fei Fei is atmospheric, indisputable. Dahai suddenly said on the side: "This two-person cooperation is easy to handle, we still have to have a group confrontation on the problem, if Fei Fei can be strengthened, we can win." As soon as this sentence was said, everyone's hearts became tense again, yes, giving up the two-person cooperation project also means that the group confrontation is even more hopeless.

Hao Yun pondered and finally came up with a solution, but he still had to make sure. The cage technique is a trapping technique, so everyone has always considered how to become stronger, but if you don't think of it as a trapping technique but an attack technique, there is actually another choice. How can the cage technique trap the opponent for a breath of time, and if the opponent is severely injured during this time, it doesn't matter if the cage technique is broken.

After Hao Yun proposed this direction, everyone's thinking was suddenly opened. The sea said that you can add an ice spell to the cage technique, so that you can freeze the opponent. Quartz Sword suggested that after the cage technique was trapped, it should be solved directly with a flying sword. In the end, these were all rejected by Hao Yun, and everyone also saw that this guy must have thought about it and deliberately brought it up to see if everyone had a better way. Fei Fei was in a hurry, and gave Hao Yun a slap, and asked him to hurry up and say it angrily.

Hao Yun's method is to let the cage technique explode after being trapped, everyone listens to it, cut, just this idea, it's too simple but it's also difficult to achieve. First of all, explosives are needed for the explosion, and if the fireball that Doctor Liu exploded at that time can be released, there is no need to engage in any cage surgery. Second, even if there are explosives, where are the explosives? The volume of powerful explosives will not be small, so put them on the seeds, when the opponent is stupid, such a big lump of explosives, will they still step on it? Finally, even if people are stupid and step on it, they will be trapped by the cage technique, how to detonate it, send a fireball, and be extinguished by someone halfway? What should I do if I miss it? What should I do if it suddenly rains and extinguishes it? Fei Fei said like a gunner, she thought that Hao Yun would be knocked to the ground by her words, but Hao Yun was not in a hurry at all.

Hao Yun said slowly: "Feifei, there are two problems now, if you can do it, we will have the next step." Are you ready to answer my question?"

Fei Fei nodded: "Ready!"

"Okay, first question, can you turn the cage into a relatively closed space. ”

"It can be done, you can choose large-leaved plants. ”

"Okay, second question, can you fill this cage with a certain amount of plant dust, which has to be combustible. ”

"It can also be done, you can use pollen from plants. If these two conditions are met, it is very simple to find large-leaved flowering plants. But what's the use?"

"That's it, I can detonate them and make them into a dust explosion! ”

"Use fire crystals to ignite the explosion, huh?" the sea asked.

"That's right, because this principle is not like the fire crystal gun to push the missile, which needs more fire crystal explosion to generate thrust. And this can be detonated with just a little spark, and I only need a grain of fire crystal powder to do it. So just let Fei Fei's spirit seed stick a grain of fire crystal powder, and once the opponent falls into the cage, I can detonate it. ”

Everyone looked at Hao Yun strangely and asked if it would work? Hao Yun said, try it tomorrow, as long as Fei Fei can form a cage with such conditions, he can make it explode, if not, he will invite guests to drink and eat.

The next day, when the test results came out, everyone shouted incredible, such conditions can really explode, but the power is not great, and it can only deal with ordinary people, not to mention blowing up the cultivators, at most it is terrifying. Hao Yun thought carefully for a while, when he let Fei Fei form a cage, and then let the space be mixed with forty percent of the wood spiritual power, the explosion power of this test is enough, the body of the early stage of Jindan and below can be directly shattered, and the middle stage of Jindan will definitely be seriously injured and lose mobility, and the late stage of Jindan will cause moderate damage.

Seeing this result, Fei Fei was overjoyed, because she finally had a big killer weapon as well. Hao Yun was also very happy, happy that he was able to come up with this idea and do something for Fei Fei to make her happy. But in a blink of an eye, why is it still an auxiliary device this time, is he only suitable for lighting a fire, this is the life of a lighter!