Although the invasion of creatures from the otherworld brought significant damage to Earth, some humans ventured into the territories of the alien beasts and brought back many ores.
Some of these ores helped in the development of advanced machinery, which greatly assisted in construction efforts.
After abandoning destroyed cities, humanity quickly built new ones.
In such times of crisis, the unity of humanity showcased its remarkable ability to rebuild.
"I'll stay here for a day to teach you how to cultivate," Yefan announced.
"Cultivation?" the commander asked, intrigued.
"It's a method to absorb the energy of heaven and earth, refining the body and making it stronger," Yefan explained calmly.
Cultivation… The commander's eyes widened slightly. "Can it make you impervious to bullets?" he asked, unable to contain his curiosity.
After all, what Yefan had demonstrated was beyond shocking. He had moved effortlessly among the alien invaders, while bullets indiscriminately fired at him had no effect. It was unbelievable.
"Not just bullets. If you cultivate to a high enough level, even missiles won't kill you," Yefan said with a cold smile.
"You can withstand missile strikes?" the commander swallowed nervously.
"Not only missiles," Yefan replied nonchalantly. "Even the world's most powerful nuclear weapons wouldn't kill me."
He wasn't exaggerating. The War God Scorching Heaven Technique was immensely powerful. After absorbing so much energy, Yefan's strength had grown even more formidable. He had unlocked many new abilities, and his body had become tougher and more resilient.
Hearing Yefan's words, the commander was left speechless in awe.
…
The next day arrived swiftly. The large public square was filled with soldiers awaiting instruction.
"Hello, everyone. Let me introduce myself, I am Yefan," he said as his figure hovered in the air, addressing the soldiers below.
"I'm here to teach you a cultivation technique called the Body Tempering Art."
Yefan continued, "There's always been a faint cosmic energy in Earth's atmosphere, but it's usually hard to perceive. However, with the emergence of the otherworldly rifts, stronger energy has begun to flow into our world, making it easier to sense this cosmic energy. Today, I will teach you how to harness it using the Body Tempering Art."
Yefan's voice was powerful and clear, reaching every soldier in the square. While it wouldn't be easy for ordinary people to cultivate, the soldiers, with their naturally strong physiques, would have a better chance of mastering the technique. Yefan intended to teach the soldiers first, who could then pass the knowledge to others.
"Wu Yifan, have you already learned the Body Tempering Art?" the commander asked, suppressing his excitement as he glanced at Wu Yifan standing beside him.
"Of course," Wu Yifan nodded with a smile. "I mastered it a few days ago."
"How effective is it?" the commander asked.
"Why don't you punch me and find out?" Wu Yifan said, patting his chest confidently.
"Really?" The commander hesitated.
"Go ahead. I'm not worried," Wu Yifan grinned, showing no fear.
"Alright, here I come," the commander said, clenching his fist and throwing a punch at Wu Yifan's chest.
Bang—
His fist collided with Wu Yifan's chest, but it felt like hitting solid iron. Pain shot through the commander's hand, and when he looked down, his knuckles were scraped, with blood seeping out.
"You… did you put a steel plate under your clothes?" the commander asked in disbelief.
"Nope," Wu Yifan said, lifting his shirt to show his chest.
"Then how…"
"The Body Tempering Art is a secret cultivation technique that allows you to absorb energy from the air and refine your body," Wu Yifan explained. "I've only tempered my skin, but the effects are already incredible!"
Even though he had only refined his skin, the results were astounding, far beyond what anyone had expected.
"This is… incredible," the commander muttered, still in shock.
At that moment, Yefan had begun instructing the soldiers on how to cultivate the Body Tempering Art. The commander quickly focused, listening intently.
Yefan's teaching was detailed, and the entry-level process was relatively simple. Soon, many of the soldiers followed Yefan's instructions, sitting cross-legged and beginning to sense the energy in the air.
Those with keen perception or innate talent found it easier to make progress.
"This is…" The commander, sitting cross-legged among the soldiers, suddenly felt something. His eyes widened as he sensed the cosmic energy that Yefan had described.
Was this the cosmic energy?
Without hesitation, he started practicing the Body Tempering Art as Yefan had taught. Soon, the cosmic energy began flowing into his body at a visible rate. He could feel the cool sensation of the energy particles entering his body.
"This is incredible!" he thought, marveling at the power. He continued to gather the cosmic energy, allowing it to cover his skin and refine it.
However, as soon as he started the tempering process, a sharp pain shot through his body. It felt like countless needles piercing his skin.
But Yefan had warned them that this was normal—the process of refining the skin was always painful.
He took a deep breath, enduring the discomfort as he absorbed more cosmic energy to continue the refining process. The pain, while intense, was nothing compared to the life-threatening battles they had to face in the future.
High above, Yefan floated in the air, watching the soldiers as they began to enter the first stages of cultivation.
"The Body Tempering Art is relatively simple and suitable for most people," Yefan thought to himself. "More advanced techniques would be too difficult for them. Perhaps, out of millions, only one might have a chance to learn those."
With that, Yefan decided to rest for the day. Tomorrow, he would head to Tianyun City.
This time, his parents were most likely there. The thought made Yefan a little excited. The commander had already confirmed through contacts that his parents were safe in Tianyun City.