Shi Mu's eyes fell on the furnace, and he saw that a circle of fiery red runes was engraved on the furnace, forming a magic circle, exuding a faint mana fluctuation.

"This is a formation mage I specially invited from the door, and the Gathering Sun Array set up can increase the temperature of the flames. Zhao Ping saw the look of surprise in Shi Mu's eyes, and explained.

Shi Mu nodded, with the help of this formation, the chances of success this time were much greater.

"In fact, after creating this meteorite black knife, I also thought about refining it into a magic weapon, and the basic steps have almost been thought out, but first, considering the weight of this knife, and second, there is still a lack of golden lizard venom. Senior Brother Shi should also have a deep study of the way of refining, so I just want you to give me some advice. Zhao Ping smiled and took out a bound book from his arms and handed it to Shi Mu.

"I don't dare to give advice, these **** have also consulted a lot of classic materials for refining magic weapons, and I happened to discuss it with Senior Brother Zhao. A hint of surprise flashed in Shi Mu's eyes, he took the book and smiled.

He immediately opened the book, read it carefully, and discussed with Zhao Ping about the steps of refining the weapon.

Shi Mu was not proficient in casting, but his understanding of formation runes was far from being comparable to Zhao Ping.

After the two discussed for more than half an hour, they finally finalized the process of division of labor and cooperation between the two.

"By the way, I don't know what kind of talisman formation Senior Brother Shi wants to engrave on the black knife?" Zhao Ping suddenly thought of something and asked.

"Flame Rune Array. Shi Mu said without hesitation.

As far as I know, this rune array is composed of twelve runes, and it is one of the most complex low-level runes. Zhao Ping was a little surprised.

"Not bad. Shi Mu said with a faint smile, this talisman array was decided by him after careful consideration.

There are not many runes he can draw at the moment, and the Flame Rune Array is the most powerful, and he has drawn it many times on the runes, so he is already quite familiar with it. In addition, the Meteorite Black Knife is extremely heavy, and if it is combined with the bursting attribute of the Flame Rune Array, it can greatly increase Shi Mu's instantaneous attack power.

"Now that Senior Brother Shi has decided, he must be quite sure, so let's follow what Senior Brother said. Zhao Ping saw that Shi Mu had already made up his mind, so he nodded and began to turn up the flame of the furnace.

Shi Mu also took out the meteorite black knife he was carrying and handed it to Zhao Ping.

The early work still needs to be done by Zhao Ping, who is responsible for the later portrayal of the rune array.

The flames on the stove gradually grew larger under Zhao Ping's control, and the temperature in the entire secret room became higher and higher.

When the flames reached a certain level, Zhao Ping clamped the meteorite black knife with a large fire tong that was long and put it into the furnace.

Immediately, he took out two fiery red spars from his arms with some pain, and they were the two inferior fire spirit stones, which were inlaid on the two formation eyes of the formation on the stove.

Bang!

The formation runes on the furnace suddenly lit up, emitting bursts of scorching red light, and the flames in the furnace also shook suddenly, shrinking a few points, but the flames became more pure, and the heat emitted suddenly increased by a few times.

Zhao Ping's back was already soaked with sweat, and beads of sweat rolled down his forehead and cheeks from time to time, but he seemed to be unconscious, staring at the black knife in the flames with blazing eyes, and his hands kept turning skillfully.

Time passed little by little, and after half an hour, the black knife in the flames gradually turned red.

Shi Mu stretched out his hand to wipe the sweat from his face, and a hint of joy flashed in his eyes.

If it weren't for the furnace blessed by such a gathering sun array, I am afraid that an ordinary furnace would not be able to make this knife hot.

Zhao Ping's face was extremely solemn, his eyes were fixed on the changes in the black knife, and after a while, his eyes suddenly widened, and he grabbed the fire tongs, clamped the black knife away from the flames, and put it on the casting table on the side.

"Venom!" he snorted, holding out his hand.

Shi Mu hurriedly handed over the porcelain bottle containing the venom of the golden lizard.

Zhao Ping took the porcelain vase and let out a low snort, a faint red light faintly appeared on his body, especially a red light appeared in the palms of his hands, and a wave of heat began to diffuse, forming a faint fiery whirlwind around his body.

Shi Mu's eyes showed a hint of discoloration, Zhao Ping's cultivation technique was obviously fire attributed, looking at this momentum, his cultivation was far above Baishi's Yang Gong.

Zhao Ping opened the cork of the porcelain bottle, carefully tilted the mouth of the bottle slightly, and suddenly a pale yellow viscous liquid dripped down and landed on the red meteorite black knife.

He let out a low snort, and a red light suddenly appeared in his palm, enveloping the black knife like a flame.

The sound of "snort" sounded!

Under the control of Zhao Ping's true qi, the yellow liquid changed rapidly, and soon turned into a layer of yellow film as thin as a cicada's wings, completely covering the blade surface of the meteorite black knife.

Now the surface of the Meteorite Black Knife has begun to soften under the action of heat and venom, and once its temperature cools, the hardness will return to its original state. Senior Brother Shi, hurry up and burn the rune array!" Zhao Ping's palm red light suddenly dissipated, and he took a step back with a pale face and said.

Shi Mu had already waited on the side and took out a red magic pen.

This magic pen is a special thing, the tip of the pen is abnormally hard, different from the pen used when drawing talismans, it is specially used to depict the talisman array when refining magic weapons.

Shi Mu took a deep breath, the magic pen in his hand fell on the crimson knife, and his wrist rotated steadily and flexibly.

At this time, his eyes had already turned pale gold, and since his back was to Zhao Ping, he naturally didn't worry about the other party finding out.

But seeing his wrist turning, his breathing was slow, and one rune after another slowly appeared on the surface of the knife.

After a meal, twelve runes emerged, forming a complete Flame Rune Array.

When Shi Mu finished drawing with the last stroke, a faint layer of red light suddenly appeared in the entire rune array, emitting a wave of fire attribute mana fluctuations.

"It worked!"

Zhao Ping, who was on the side, was overjoyed when he saw this, and couldn't help but let out a cheer.

However, at this moment, Shi Mu had no intention of stopping at all, and with a flick of his wrist, the red magic pen fell on the first rune of the Flame Rune Array, and began to carve it again.

"Senior Brother Shi, you ...... You want to stack the rune array......" Zhao Ping was dumbfounded and muttered in a low voice.

Shi Mu's expression was focused at the moment, and he didn't seem to hear Zhao Ping's words at all.

Zhao Ping took a deep breath, and a hint of strangeness flashed in his eyes when he looked at Shi Mu.

When refining magic weapons, it is true that the power of magic weapons can be enhanced by stacking rune arrays, but the superimposed rune arrays have extremely harsh requirements for rune masters.

The overlapping runes must be identical, and if any one of the runes deviates slightly, the burned rune will completely collapse and the entire artifact will be scrapped.

It is already extremely difficult to burn the rune array on the weapon alone, and the practice of stacking the rune array is something that even a skilled rune master rarely dares to try.

After all, there is a world of difference in difficulty between burning two runes and burning two identical runes.

Shi Mu's eyes emitted a faint golden light, and he didn't hesitate in the slightest move, and it didn't take long for the second rune array to be drawn.

The red light flickered, and the rune array on the knife surface was much brighter than the first time.

Zhao Ping exhaled a long breath, his hanging heart finally relaxed, and he was about to speak, but his face suddenly stiffened again.