At this time, the high platform where the Sword Casting Furnace was located was no longer flat, but there were grooves, which surrounded the Sword Furnace, extended to the base of the Sword Furnace, and continued to extend at the invisible bottom.

Without Tang Banqing's introduction, Lin Tian had already guessed that the function of these grooves must be to deflect the molten iron in the sword furnace. The iron juice follows these zigzag grooves and finally converges in a sword-shaped mold, and when the iron liquid solidifies in the mold, a sword blank is formed.

The sword blank is then forged thousands of times, and then quenched, and the main process of casting the sword is basically completed. Of course, this was the general sword-forging process that Lin Tian had learned from ancient books, and he didn't know what the differences in the techniques of the sword-forging masters were.

"Lin Tian, come over here and paste the fire suppression talisman on the south side of the sword furnace. Tang Banqing took out a wooden box and motioned for Lin Tian to paste the talisman.

This wooden box Lin Tian had already seen, it contained the Zhang family's fire control talisman, after he opened it, he took out the fire suppression talisman, and then took the sword furnace as the center, and carefully calculated the direction, which happened to be the front of the sword furnace.

Lin Tian took the fire talisman and gently patted it on the sword furnace, and as soon as he pasted it, the rune paper suddenly flashed, and a burst of fiery red light erupted, and in the light, there was a faint firebird spinning, and the feathers of the firebird's whole body were burning with red flames.

Seeing this firebird, a noun flashed in Lin Tian's mind - Vermilion Bird. Suzaku is one of the four elephant beasts, located in the south, and is in charge of fire.

The red light just flashed away, and then the entire sword furnace flashed, and it also flashed with red light, and the red light flashed a few times before it disappeared into the furnace body.

"The Fire Suppression Charm can condense firepower and protect the sword furnace from being burned, and this sword casting is no small few. Tang Banqing saw that the Fire Suppression Talisman was in effect, and nodded with satisfaction.

Tang Banqing took another step forward, turned his head sideways and said to Lin Tian, "Okay, now go and open the Earth Fire Passage and heat the sword furnace." ”

Lin Tian had already seen the method of opening the Earth Fire Channel, and the last time he tested the Transformation Stone, Tang Banqing had opened it once. He approached the sword furnace and examined it closely, discovering the mechanism that had been opened.

Reaching out and pressing hard, a few clicks sounded, and then the entire underground space was shook, and there was a "boom" sound from the underground, accompanied by the "click" sound of the mechanism.

The basement, which was originally a little stuffy, gradually increased in temperature, and the entire underground space became a sauna, but everyone present was a master, and this temperature would not become an obstacle, and even sweat did not come out.

The vibration and noise gradually became smaller, and at the same time, a red light appeared inside the sword furnace, and the red light became more and more intense, as if there was a flame flowing.

Tang Banqing walked around the sword furnace, and even touched the furnace with his hand to sense the temperature, as if he felt that it was almost there, so he said to Lin Tian: "Lin Tian, throw the carbon crystal in." ”

For carbon crystals, Lin Tian is very familiar with them, the fuel used in refining medicine before is carbon crystals, the combustion temperature of carbon crystals is extremely high, and it is very stable, easy to control, and it is the best fuel.

He glanced at several boxes underground, and in one of the boxes he saw black and shiny carbon crystals, the texture was like high-grade black jade. Lin Tian grabbed a few pieces and threw them into the mouth of a dragon's head.

With the input of carbon crystals, the red light in the sword furnace changed, turning into a faint purple flame, and the appearance of the purple flame made the temperature in the furnace rise again.

"Plus. Tang Banqing shouted again, Lin Tian grabbed a few pieces and threw them in, so continuously put in the fuel, after a while, a large box of carbon crystals was used up, and the flame in the furnace had turned pure purple, and the temperature was even more terrifyingly high.

Lin Tian noticed that every time the carbon crystal was put in, when the temperature increased, the fire control talisman would quickly flash a red light, and every time it flickered, the temperature in the sword furnace would rise rapidly.

Sure enough, as Tang Banqing said, the fire control charm can condense firepower, and the earth fire, fire control charm and carbon crystal burn, under the superposition of the three, the temperature in the furnace is getting higher and higher.

"Test the temperature. Tang Banqing said again.

Lin Tian was stunned for a moment, and said puzzledly: "How to try?" His first reaction was, do you want to try it? There is no thermometer here.

Tang Banqing glanced at him, then pointed to one of the boxes: "That's an alloy iron ingot, throw it in and take a look." ”

I see, Lin Tian realized, it turned out to be such a test method, he picked up a piece of alloy iron ingot, the feel was slightly heavy, the weight was not light, and then he threw it from the mouth of a dragon's head.

Lin Tian turned on the super perspective and observed the alloy iron ingot, the iron ingot encountered flames, and the outer layer actually melted in the blink of an eye, and the entire alloy iron ingot did not last ten seconds before it was all declared melted.

The molten iron juice flowed to the bottom of the sword furnace and flowed out of the groove, Tang Banqing pressed it on the ground, and a groove was suddenly diverted, and the iron juice also flowed to another place.

It was a dagger-shaped groove in the mold, into which red iron flowed and cooled, and the sword blank was formed.

"Take it out and forge it, feel the strength. Tang Banqing guided again, as if he was teaching his disciples, step by step.

Under the guidance of a famous teacher, Lin Tian of course sells mechanics, takes out the sword blank with iron tongs, and puts it on the anvil, at this time the sword blank is still dark red. He thought back to the forging method recorded in the book, and began to fight with a clang.

The others watched it interestingly, but Ling Shuiyao's face was full of boredom, she came to see the birth of the Excalibur, who knew that it was on-site teaching.

Lin Tian's forging speed and strength were incomparable to others, and soon, a dagger with the length of a palm was formed, Tang Banqing opened a stone slab, and there was clear spring water in it, which was still flowing slowly, and there was obviously a culvert dug underground, but it was unknown where this spring water came from.

With a comprehension, Lin Tian put the dagger into the water, and with a snort, a puff of water vapor appeared.

"Well, the first fight, it's not bad. Tang Banqing took the dagger, looked at it a few times, and appreciated: "You can start now." ”

As soon as he heard about it, Ling Shuiyao, who was originally listless, suddenly looked bright, and Lin Tian also tightened his heartstrings, this time the sword casting must not tolerate a little mistake, otherwise those rare materials will be wasted, and such superb materials may never be found in the future.

"Onimaru broke the knife and threw it in. Tang Banqing said dryly.

Lin Tian picked up the two severed blades of the ghost pill and threw them in, the ghost pill came into contact with the flames, and the ornament of the handle of the knife instantly incinerated and disappeared, but the main part did not melt as quickly as an iron ingot, but only quickly turned red.

"Re-invest in carbon crystal ......"

Lin Tian threw himself into it according to his words, and the flames suddenly burst up, and the Bafang dragon head also inhaled a stream of air, forming eight flame streams in the furnace, and the flames immediately wrapped the ghost pill.

"Squeak......

A strange sound suddenly came out of the ball of flames, and the sound was sharp and piercing, piercing the roots of people's ears numb, and even making people feel pimples, and Ling Shuiyao, who had the weakest skill among the several people, even took a step back.