"The top of the mountain is above..."

With the voice of speaking, a small head appeared on the steps of the sacred mountain, peering into the cave on the top of the mountain, "Strange, where is that big monster? Why didn't I see..."

"Luffy, keep your voice down, and don't alarm that monster..."

"I speak quietly, okay..."

"This cave seems to be very narrow..." Guina looked inside the cave from the entrance of the cave. "If you fight, there doesn't seem to be much room to escape!"

"I don't think it's a bad thing to be narrow," Sabo gestured with his hands, measuring the size of the cave. "We have nowhere to hide, nor can the monster."

"The monster, where is the monster..." Luffy looked around.

"But this kind of place is not suitable for early detection," Ace frowned. "When we can spot the monster, it will spot us."

"It's easy..." Little Usopp flipped through his bag twice and took out a video phone worm. "We can use this."

"Usopp, why do you bring a surveillance phone worm?"

"Be prepared and prepared, be prepared..." Little Usopp touched his head and answered honestly.

"You really look like the boss at this point!" Sabo looked at Usopp with admiration.

"Then what shall we do next?" Luffy asked.

"That's it..." Little Usopp walked into the cave and looked around, then placed the surveillance phone worm in a safe corner, "Next we just have to make a little noise here..."

Before Little Usopp had finished speaking, these little guys heard a rumbling sound from the depths of the cave, and the sound was getting closer.

"It seems we don't need to make a noise!" Sabo shrugged, "Hurry up, everyone!"

Actually, without Sabo's reminder, when he heard the sound, a few little guys had already moved quickly and hid from the top of the mountain to the mountainside.

"Hurry up, Usopp, turn on the monitoring, let's see what is going on with that monster?"

"I'm doing it, don't rush me!" Little Usopp took out another phone worm, dialed the number of the surveillance phone worm placed in the cave in advance, and looked at the phone worm in the cave. The arrived image was released.

"I rely on..." After seeing the monster in the image, Little Usopp called out the auxiliary word that he learned from Kong Ming, "What is this thing?"

I saw that the monster that appeared in the video phone worm was a large fleshy ball with densely covered spines, which looked exactly like sea urchins at first glance. Moreover, judging from the movement of the monster in the image, its behavior is exactly the same as that of a sea urchin, relying on the spines that can move and retract freely.

"No wonder Uncle **** Buh called it sea urchin..." Ace sighed.

"Usopp, enlarge the image here..." Sabo poked his hand somewhere in the image.

"It's ready soon!" Usopp skillfully pinched the phone bug, and after one operation, he doubled the place where Sabo pointed with his finger.

"Not enough, zoom in a little bit..."

"Ok!"

"That's it," Sabo looked at a certain part of the image carefully. "This sea urchin doesn't seem to have a very high attack power. Look here, this is the trace left on the rock wall after it stretched its spines just now... …"

"Indeed, the traces are very shallow!" At Sabo's reminder, Guina also looked out, "Similar to the traces left by me swinging a knife with a three-point force."

"But Guina, your peace word should be sharper than this sea urchin's thorn, so you have to count as a six-point attack at least." Little Usopp pointed out Guina's omission.

"But this sea urchin’s thorn attack is very fast," Ace said with his finger at the surveillance video, "Look, we can hardly see its thorn contraction and puncture, only the thorn tip can quickly follow. Sparks from the collision of the stone walls."

"Yes, a monster with high agility but average strength!" Sabo made the final conclusion.

"So you said for a long time, how should we beat him?" Xiao Lufei pointed out the point of the problem sharply. "This kind of monster with thorns all over, feels like it will hurt if you hit it with a fist. If you can pull out all the thorns on it, then we can hit it as we want!"

"The speed of this monster is indeed very fast, but the problem is that its location is too inappropriate..." Ace stroked the monitor with his hand, "For such a narrow cave, how fast its speed is. , We can completely withstand its attack, and then let Guina cut all its thorns one by one."

"No, no, no..." Sabo grinned, and the missing tooth looked very cute. "I have a better idea, an idea that allows us to solve it easily."

"What idea?" Guina asked.

"Look at the passage of this cave..." Sabo knocked on the path of the cave with his hand. "As long as we turn the ground into mud temporarily, it will be a wonderful trap. After the sea urchin's body sinks in, Let's turn the mud into stone..."

"It's really simple..." Guina cut with disdain, "Using your mental power and mana, you can release fossils into mud and turn mud into stones. How large is the area that you want to sink this sea urchin in, How much area do you need to build?"

"Isn't there you still?" Sabo said with a smile.

"Is it enough to add me? Don't you know how big Saab can be handled by our two mana?"

"Plus you, plus this..." Sabo took out two mana scrolls from his bag. "That's enough!"

"Brother Kong Ming made mud-to-stone and fossil-to-mud scrolls?" Guina looked at Sabo in surprise, "How come you have such a thing? Is Brother Kong Ming so eccentric?"

"Of course not," Sabo touched his nose. "This is the scroll when the boss gave us practice when he was building the underground maze..."

"But didn't that scroll be used on the spot?"

"I thought it might be useful to stay here, plus I didn't completely release these two spells myself, so I was useless at the time, I saved it..."

"It's no wonder that during that time, you worked until midnight..." Guina looked at Sabo with shocked eyes, "With your mental power and mana at the time, you might have to overdraft yourself to keep up with the progress of the project!"

"It's okay!" Sabo grinned, "The eldest sister led me to a magical place, where several meditation potions appeared every day!"

"It's a wonderful place where you can appear on your own meditation potions!" Guina said enviously, "Why didn't I find such a place in the mage tower!"

"Wait..." Ace suddenly inserted a sentence next to him, "Is the magical place you mentioned, is it the last floor of the underground, next to the element pool, the locker of the boss of Kong Ming?"

"That's where..." Sabo felt wrong when he said it, but it was too late.

"So..." Ace has already clenched his fists, "The reason why we have doubled our homework during this time is because you and the older sister steal the boss's meditation potion every day?"

"It's not every day..." Sabo looked at the four little guys gearing up with a look of horror, "Occasionally, I am really only occasionally, the big sister's head is every day, you are being added homework is the big sister's problem Ah, it has nothing to do with me, what are you going to do..."

Before Sabo finished speaking, he only heard a bang. He was knocked over by someone, and then a female voice said indignantly, "You have to blame others for doing bad things, brothers, beat me!"

Now that someone had started, the four little guys immediately rushed forward and beat Sabo.

"Wait..." After a few punches, Ace seemed to think of something, "Why did the person who spoke just now sound like a big sister?"

"It sounds like..." Guina also stopped.

"What?" Xiao Lufei said in surprise, "It wasn't Guina who was talking just now?"

"Of course not me!"

"Not who you are?" Little Usopp asked.

After a cold wind blew, the few little guys looked at each other, sat down tacitly, and began to seriously discuss how to deal with the sea urchin.

"With these two scrolls, it's easy..." Sabo said honestly, with a few more bags on his head, "First, let's find the middle part of a cave, and then wait for the sea urchin to come and attack. In our time, we used fossils as mud to soften the ground, and then when the sea urchin fell halfway down, we used the fossilized mud as a stone, so that the sea urchin would be fixed on the ground...

"... became a living target!" Little Usopp said.

"In other words, we need to temporarily resist the sea urchin when it rushes over," Ace said solemnly, "I think we need a larger shield..."

All eyes collectively turned to Usopp.

"What are you looking at me for?" Usopp looked at them with innocent eyes. "How can I come out with a shield on me?"

"Cut!" Everyone looked at him with contempt.

"Why don't I take it!" Xiao Lu Fei raised his small fist, "I am a rubber man now, and it is impossible for that sea urchin to pierce my skin."

"No, it hurts to be stabbed..." Ace touched Lu Fei's head with his hand, "I'll do this, brother. Sabo, give me your stick! Usopp, Get me a roll of rope!"

"Here!" Sabo happily handed over his stick.

"Okay!" Usopp also took out a roll of rope.

Ace skillfully tied himself and Sabo’s stick into a cross with a rope, and then used the rope to skillfully stretch a rough outline between the crosses, and then dug some dirt from the side and piled it into the outline, then He gestured to Sabo, "Sabo, turn mud into stone, turn this shield into stone!"

"no problem!"

"Ace, you are so smart..."

"What a clever thing!" Ace looked at where Sabo was singing intently, and then turned the mud into stone to temporarily solidify the mud shield he made. "When this matter is over, I will find the boss to order mine Weapons, two-handed swords, long swords, and shields must all be present!"

"But I still find it convenient to use my fist..."

"Luffy, you are special..."