Tang Hao moved, his movements seemingly no different from before. With his legs driving his waist, his waist driving his back, and his back driving his arms, the iron hammer struck the iron block with a loud clang.

  As the iron hammer bounced back due to the reaction force, Tang Hao suddenly turned around, still using his calf to exert force. The rebounding hammer had already been swung up by him, swinging in a circle in mid-air with a strong gust of wind, and another loud crash landed on the iron block again. This strike was not only extremely fast but also seemed to be more powerful than the first one.

  The iron hammer bounced high, and Tang Hao's movements seemed to reach a perfect match with the amplitude of the iron hammer's bounce. Not too early or too late, just as the iron hammer was about to reach its highest point, his body swung the hammer in a circle and struck again.

  Tang San's eyes lit up, this was clearly a technique that borrowed force to amplify his strength, using the rebound force generated by the collision between the iron hammer and metal to transform into the power of his next strike. The movement was perfect and coordinated, maximizing the avoidance of harm from the rebound force to himself, instead transforming this force into continuous attacks. From the second strike onwards, each strike's power exceeded Tang Hao's full strength, yet remained under his control.

  Tang Hao's movements became increasingly swift, his hammer striking the iron block with a frenzy akin to a stormy rain. The iron block continued to deform under the hammer's blows, and what was astonishing was that Tang Hao's strikes were extremely accurate. Every time the iron block was hammered to about half its original thickness and began to flatten, his hammer would strike the edge of the block, causing it to flip over. As a result, the iron block was subjected to evenly distributed hammering rather than being simply pounded into an iron pancake.

  In the blink of an eye, the thirty-six hammers had been swung out. Tang Hao's hands moved in a blur as he spun the hammer three times in mid-air before dissipating the force and standing still with his hammer at rest. His face was not red, nor was he panting, as if the previous storm-like blows were not made by him.

  The entire iron block was reduced by a whole circle between these thirty-six hammerings, and with the naked eye it was already very difficult to see any impurities in it.

  This is truly a blacksmith's skill, what a beautiful hammering technique.

  "Understood?" Tang Hao looked at Tang San who was continuously pulling the bellows.

  Tang San thought for a moment and said, "Borrowing power and using power, I understand the principle. However, this seems to be not that simple."

  Tang Hao said calmly, "If you want to reach my level, there's only one way: practice makes perfect. At the same time, remember that when striking a piece of ordinary metal, it's easiest to shatter when it has the most impurities. So, at that moment, your strength should be slightly reduced. As the impurities decrease, you can gradually increase your strength while maintaining the effect of the strike. The key is controlling the force. You practice slowly by yourself. Don't blindly increase your power and speed; accuracy is equally important. At least, you need to know where this hammer will land; otherwise, what's the use of having great strength?"

  The Forging Hammer returned to Tang San's hands, and Tang Hao turned around and left.

  The father did not go back on his word, and he indeed taught him the method of casting himself. Moreover, from what the father taught him, it can be seen that any industry has its own secrets, which are not so simple.

  In the following half month, Tang San practiced the forging method that Tang Hao taught him every day. Although he had Kontakei to assist with controlling his strength and Purple Extreme Magic Eye to determine the position of his hammer strikes, this forging method was even more difficult to master than he had imagined.

  Since it's a full-force strike, the power used is already hard to control. With the help of rebound force, controlling the body's balance and hammering to the desired location is even more difficult. Without increasing the number of strikes, the required control force must be increased by several points. The continuous rotation of the body not only makes the brain feel dizzy, but also makes each strike's power harder to control.

  Fortunately, that piece of iron ore had been hammered for a long time and its impurities were very few, so it was not easy to break. Otherwise, under his uncontrollable heavy hammering, it would have broken into pieces long ago.

  However, in the process of this exercise, Tang San's application and control of Xuan Tian Gong, as well as his coordination with Kontou Kouryuu, Xuan Yu Shou and Zi Yue Ma Ting, were all silently improving.

  From the first day when he could only swing two hammers and had to deviate from his position, to today half a month later, he can now continuously swing seven hammers, accurately hitting that iron block. The progress is very obvious. At the same time, the iron block is also becoming smaller and smaller under his full-strength hammering, with results every day.

  Of course, this is also closely related to the method of using calf strength. With this method of exerting force, it greatly reduces the consumption of Xuan Tian Gong, allowing Tang San to have more time to pull the wind box and perform tempering.

  At first, his father was swinging thirty-six hammers and still seemed to have some energy left over, while he himself only had seven hammers. Every time Tang San thought about this, he practiced with even more motivation.

  These days, he seems to have forgotten about the Wu Soul and the Soul Ring. Even when he goes to the top of the mountain in the early morning to cultivate the Purple Extreme Magic Eye, he is thinking about how to swing his hammer.

  Three months passed quickly, and when Tang San could wield his hammer to continuously launch thirteen hits, Tang Hao began teaching him how to forge instruments. Tang Hao's teaching method was very direct - he would do it once himself, then have Tang San repeat it. As long as Tang San showed some understanding, he would let him practice on his own without much verbal guidance, only speaking up a sentence or two at critical points.

  It was precisely because of this that every time Tang Hao spoke and pointed out something, Tang San remembered it especially clearly.