"Hu——" As expected, as Guan Heng expected, he released a trace of fire aura when he patted the edge of the box with his palm, and was immediately absorbed by the box.

"So that's it. This box only 'likes' the fire spirit." Immediately afterwards, Guan Heng tried it with four spiritual energys, such as water, wood, metal and earth, and found that the box was not interested in them and did not absorb them.

"Aheng, did you test out what's weird about this box?"

"Well, I basically got a preliminary understanding."

When Guan Heng heard Qing Huang ask a question, he replied: "The metal box can only absorb a single fire spirit, but even so, it is a rare treasure. Let's do this, and I can infer what specific function it has."

"Okay, try it now." Yan Xin and the others were very eager to see what the box was for, and they all said impatiently. "Don't worry, you can start soon."

As he said that, Guan Heng grabbed the edge of the box, "Huh Huh!" The next moment, he continued to output a large amount of fire spirit again, and the metal box seemed to be unable to stop and absorbed it madly.

"Buzz buzz - Buzz buzz -" In an instant, the surface color of the metal box turned red, and the temperature continued to soar. Guan Heng waved his hand and shouted, "Everyone retreated!"

"Swish!" As soon as this was said, all the companions did as they said, "Swishshi!" In the blink of an eye, countless hot fire lights appeared on the surface of the metal box, and they rushed in a fan-shaped direction.

"Boom boom boom!" The fire spirits hit the nearby rock walls one after another. Even though the rock wall structure here was extremely hard, countless charred and smoked holes were nailed out in an instant. This power was extremely terrifying.

"Haha, I knew that since this thing can absorb fire spirit, it can naturally be released after exceeding the limit reserves." Guan Heng smiled and said, "This should be the structural characteristics of the metal box itself, and it cannot be artificially created."

"Then, what's the use of this box?" Yan Xin was a little puzzled. Guan Heng thought for a while and said, "If it was just a box, it would be of course not very useful, but as long as it changes its shape, it should be able to use one or two."

"Change the form? How easy is it?" Ruotao said: "Young Master, you forgot that you asked Bahuo and the others to join forces to release the fire spirit energy just now, and there was no sign of burning the box. Do you still want it to change its form?"

"What Bahuo has is only a relatively powerful ordinary spiritual fire, but I am different from them." Guan Heng said: "Because I still have this!"

"Huh!" After saying that, he spread his palms and a light purple flaming seedling suddenly appeared.

"This is... Spirit-eating Purple Flame?" Qing Huang shouted in a low voice: "You haven't used it for a long time."

"You are right. First, the spirit-eating purple flame itself is fierce and irritable, and it is difficult to control it completely. Second, it has basically not been used recently. It is enough to use other types of fire spirit energy."

Guan Heng said casually: "But if you want to melt the metal box, you have to let Zi Yan try it. After all, it is said to burn out all things in the world, and it is just right to use it now."

"The most important point is that after obtaining the Agile Heavenly Fire Array, I also tried to store the Spirit-Devouring Purple Flame in it, and found that it was slightly integrated with other fire spirits, especially the center of the earth, which is responsible for neutralizing various spiritual energy. It is very suitable for it, and the purple flame is not difficult to control now."

Speaking of this, he paused a little, and Guan Heng said again: "What's more, I'm just going to mobilize a small number of Spirit-Eating Purple Flames now, so it's no problem at all."

"To burn the metal box, you probably need...well, 1.5% to 30% of the purple flames."

"call!"

As soon as he finished speaking, Guan Heng suddenly controlled the purple flame to fall on the surface of the metal box. In front of everyone's eyes, the spirit-eating purple flame air ball passed through the box like a ghost, "Go, goh..." The sound suddenly came out, and the purple flame actually left a hole on the metal box in an instant.

"Success!" Ruotao smiled and said, "Young Master's Zi Yan is indeed extremely powerful!"

"Haha, it's just a little bit." Guan Heng said: "It has been proven that purple flame can melt this thing, so I'm about to start. Everyone, please take a look!"

"Huhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

In the flash of lightning, the original purple flame sphere spread out instantly, covering the entire metal box, and then continuously melting its area. In just over ten breaths, the metal box turned into a steaming iron in the air, gradually rotating into a ball.

An Yan asked, "What should I do next?"

"Well... I think about it..." After thinking for a while, Guan Heng suddenly said: "Yes, I want to use it as a weapon that can be installed on our flying boat to attack the enemy, or it can be removed and used alone. Do you think it's okay?"

"Okay! I'm the first to agree-" Zhenwen has always been most interested in this strange invention. She hurriedly walked up and asked, "Brother Guan, what is the weapon you are going to make?"

"It's a cannon." Guan Heng said: "Since the material of the metal box can absorb fire aura and then release it quickly, it is more appropriate to use it as a long-range weapon of cannon type. I will tell you the specific principle later. I will make the prototype of the cannon body first and take a closer look."

"Swish swish swish swish!" In an instant, Guan Heng controlled the metal iron wrapped in purple flames, suddenly pulled it to lengthen, and then carefully turned it into a cylindrical shape that was slightly thinner in the front and thicker in the back.

"Bang!" The prototype of the cannon body fell to the ground, and Guan Heng immediately cooled it with Bingxuan spiritual energy.

He then said, "Okay, this is basically what it is. If you want to use this thing, you have to carve a spirit gathering array for it and constantly absorb the fire spirit. Its name is 'Spiritual Gathering Fire Energy Cannon'."

"Okay, okay, this name is really good." Zhenwen smiled and said, "Tugong Toad, put away the prototype of the cannon body first, and I will find an opportunity to adjust and modify it in the future."

"Okay, Mr. Guan." The big toad agreed and did as he said. At this moment, Guan Heng looked at the cat-faced ape and the dog-headed bear, and said, "Are you two familiar with the paths in the treasure house? If you know each other, hurry up and take us to find other treasures."

After hearing this, the ape scratched his head and looked at the barbarian bear beside him. The guy walked around several times, constantly grabbing the mane on his head, as if he was trying hard to recall what happened around him. After all, he hadn't come in for many years, so it was reasonable to not remember it very clearly.

"Don't worry, think slowly." Guan Heng knew that the other party was not intentionally hiding it, but because it was too long, he had some blurred memory, so he said, "Think carefully and think about it clearly. As long as I can take us there, I will be rewarded."

This sentence finally worked, and then the memory of the dog-headed bear suddenly became clear.
Chapter completed!