However, lava Valley focuses on refining yuan force. When martial artists practice martial arts, Yuan force in their body will always contain some impurities for various reasons, which can not be refined. The function of lava Valley is to let martial artists burn continuously when they use yuan force to resist the heat, so as to refine the impure impurities in Yuan force.


    Dragon Bufan cultivates the mysterious magic formula. The dark yuan force in his body is pure and solid. He didn''t need to come to lava valley.


    However, long Bufan stole a lot of panacea when he was a worker in huozaofang, and the reward he received when he was promoted as a worker. After taking jiuzhuan Peiyuan pill, he increased his accomplishments, but he left some impurities and erysipelas in Yuan Li.


    Through these days of cultivation, longbufan is constantly refining these impurities, but there is still a little left, which has not been completely removed. In the process of martial arts cultivation, we must ensure that the yuan force in the body is as pure as possible, otherwise impurities will accumulate and it will be more difficult to remove in the future.


    "There are one to ten levels of killing array, please choose the difficulty level of killing array." the Deacon elder martial brother in charge of lava Valley said with a stiff face. Guarding lava Valley is a hard job. Although martial practitioners are not afraid of such a heat wave, it doesn''t mean they like to stay in the steamer.


    "Level 10 difficulty, four days. Thank you, elder martial brother." long Bufan was modest and handed over his zongmen jade slips. When he came to lava Valley for the first time, long Bufan did not choose the corresponding level of difficulty according to his accomplishments, but chose the most difficult level 10.


    "Well, good!" the Deacon looked a little surprised. He didn''t think that long Bufan could resist the lava Valley killing array of level 10 difficulty. However, some people wanted to die. It''s rare to have a little fun to spice up the boring guard, so they didn''t stop it.


    "If he can hold on for a day, I''ll eat shit live," thought the Deacon.


    The other killing arrays in the seven killing arrays use arrays to increase the power of nature. For example, the cold ice waterfall makes the waterfall more powerful, the cold pool more cold, and the Wind Cave makes the wind more violent, resulting in all kinds of whirlpools and turbulence.


    But the lava Valley is reversed. The main function of the array is to weaken the power of nature and reduce the temperature of lava.


    The temperature of general lava is ten times or even higher than that of ordinary flame, and the lava in killing array is even hotter.


    Because the array increases the power of lava, the greater the difficulty level, the higher the temperature. The difficulty level of level 10 can almost reach 100 times that of ordinary flame.


    Not to mention the Kaiyuan martial arts, even if the Diyuan martial arts jump in, I''m afraid they will be burned into a pile of white bones!


    Therefore, if you want to use lava to remove impurities in Yuan force, you need to reduce the temperature through the array difficulty level, so that you can use it.


    Long Bufan chooses level 10 difficulty. The temperature of lava is more than 100 times that of boiling water. No matter how hard metal falls into it, it can also be melted.


    Under the guidance of the deacon, long Bufan came to the lava valley of level 10 difficulty. There was a pool of dark red magma in the lava Valley, and bubbles rolled up in the extremely hot air waves.


    Long Bufan is not in a hurry to go down, but takes off his clothes. After all, clothes are ordinary things. If they fall into the lava Valley, they will burn immediately. Naturally, they can''t be wasted.


    Barefoot stepped on the hot rock to the edge of the lava pool. The red magma was like boiling liquid, setting off the dragon''s extraordinary face.


    "Puff ~" occasionally, huge bubbles emerge from the lava on the magma surface, getting bigger and bigger, and finally burst, making a dull sound and suddenly ejecting hot gas.