When the fireball burns out, a large black crater forms in its place.

"Great! They're afraid of fire!" Gu Wenyu cheered happily.

"Now we can finally get out!" Xiao Tian also became happy.

"With your Uncle Fox here, I will definitely take you out safely. Honghong began to get proud again.

However, just as they were basking in the joy of victory, the thorns that had been far away quickly gathered again, and their rhizomes seemed to move, and in a short time they filled the small scorched black earth just now, just as the thorn forest had never had such a gap.

Everyone was stunned, is this plant crazy?

"How long has the big pit we just burned keep up?" Gu Wenyu asked in a low voice.

"It's just three breaths...... Honghong replied.

"How long has it taken us to burn out that big pit," Gu Wenyu asked again.

"Almost......" Honghong said uncertainly.

"One breath. Tang Zixuan on the side definitely added.

Honghong suddenly felt a drama when she heard it, "Then we will burn all the way, as long as we cooperate well, the thorns will not be able to catch up with us." ”

Gu Wenyu also nodded and added: "Theoretically, it is feasible, as long as the speed is fast enough, we can step on the previous pit every time, and then go to clean up the next thorn." ”

"Let's go, then. Xiao Tian urged excitedly when he heard this.

Gu Wenyu shook his head with a wry smile and said, "But there is still a problem. ”

"What's the problem?" Xiao Tian hurriedly asked.

"We don't know how big this thorn forest is, if we run out of soul power halfway through, we will be completely surrounded by thorns, and it will be impossible to run. What Gu Wenyu said was also that Tang Zixuan and Honghong were worried.

"What should I do then?" Xiao Tianxia asked subconsciously, but after asking, he reacted to himself, what can Gu Wenyu do.

Tang Zixuan looked at Gu Wenyu and Honghong and asked, "How much soul power did you consume just now?"

Honghong didn't think about it, and replied directly: "Seven or eight o'clock." ”

Gu Wenyu thought about it for a while, and also replied: "I used three points of soul power, and in total, with that attack just now, I can only help Honghong strengthen seven times at most." Even if one fireball can burn a safe distance of 5 meters, seven fireballs can only travel 35 meters safely. With the naked eye, this thorn forest is more than 35 meters. ”

"What are you talking about?" Tang Zixuan said he didn't understand.

Gu Wenyu then remembered that their unit of measurement should not be meters, so he explained: "That is to say, seven fireballs can probably give us a safe distance of about ten zhang." ”

Tang Zixuan agreed and nodded, but Xiao Tian looked at Gu Wenyu with a look at a monster, and asked suspiciously, "Xiaohua, when did you understand so much?"

"Uh...... Passing by a private school eavesdropping. Gu Wenyu casually recited a reason.

"Yes......" Xiao Tian was skeptical, and once again he felt that the little flower in front of him was a little unfamiliar.

Fortunately, Honghong didn't give him much time to think, and spit out a fireball directly at the thorn forest, this time without Gu Wenyu's strengthening, the fireball was directly half smaller, and the burning speed of the thorns was much slower.

Everyone's eyes were attracted by the fireball, and no one spoke again for a while.

After about fifteen seconds, a charred clearing appeared in front of the crowd again. It's just that this clearing is only more than two meters wide at most.

Gu Wenyu silently calculated the speed of the fireball burning in his heart, it would take about 18 to 20 seconds for the thorns to re-cover, and the burning speed would only take 15 seconds, that is to say, even if Gu Wenyu did not strengthen the fireball, everyone still had 3 to 5 seconds to run to the next safe area.

If Gu Wenyu strengthened the fireball, the burning speed would only take about 7 seconds, and if the red soul power was enough, Gu Wenyu would only need to strengthen it once when the time was too late, and everyone would still have hope of leaving this thorn forest.

However, the red fireball burned just over two meters in diameter, how many fireballs could he spit out, and how far could he drive a safe distance?

"Honghong, how many fireballs like this can you spit out in a short period of time?" Gu Wenyu directly asked the question in his heart.

Honghong roughly counted and replied, "About forty......"

Gu Wenyu's face was not very good-looking, in this way, forty fireballs, even if Gu Wenyu's reinforcement was added, would walk out of a distance of 118 meters at most, and this bit of energy was not enough to support everyone to walk out of the thorn forest.

Gu Wenyu thought of Tang Zixuan naturally thought of it, only Honghong and Xiaotian, who were not good at counting, were still confused.

"What's wrong?" Xiao Tian saw that Gu Wenyu and Tang Zixuan were both full of sadness, so he asked tentatively.

Gu Wenyu replied truthfully: "It's still not enough." ”

"What's not enough?" Xiao Tian didn't understand very well.

"It's not safe enough distance. Tang Zixuan explained.

"Forty of those fireballs can't do it?" Xiao Tian didn't have any idea about this distance, but simply felt that the red fireballs were very powerful.

Honghong also looked at Tang Zixuan with a puzzled expression, although he had lived for hundreds of years, he also didn't know anything about arithmetic.

"No, I can't. Tang Zixuan replied affirmatively.

Xiao Tian and Honghong were deflated at the same time, although they didn't understand why they couldn't do it, but because they believed that Tang Zixuan was judgment, they followed with a sad face.

Gu Wenyu suddenly remembered something, and she said to Tang Zixuan, "Aren't you able to control the earth element, try to control the soil under the thorn forest?"

"Tried. "Tang Zixuan had already tried to control the earth element to separate the thorn forest before using the sword, but each thorn was deeply rooted, and it was something with a Dao line, and it was difficult for him to shake it in such a dense situation.

"Didn't I give you a boost? Gu Wenyu pouted.

Tang Zixuan did as he was told, and Gu Wenyu applied a reinforcement to him.

Under Gu Wenyu's strengthened blessing, Tang Zixuan began to shift directly in front of the ground, and the thorns were uprooted, as if they had been squeezed out of the ground.

A passage more than three meters long appeared in front of Tang Zixuan, but soon, the thorns next to him surrounded him again and digested those dead thorns as nourishment.

"It's, it's horrible, they eat their own kind. Xiao Tian couldn't help but swallow his saliva when he looked at it.

Honghong jumped up directly, slapped the back of Xiaotian's head heavily, and said, "Stupid, they don't have brains at all, of course they eat everything!"

Xiao Tian covered his head, looked at Honghong, who was less than his waist, and shouted dissatisfiedly: "Why are you beating me!"

"I'm your master!" Honghong was straightforward, puffing out her face and looking angry.