He did not answer, but showed his determination with his actions.

His gaze was resolute, and he swallowed the secret medicine directly.

"I dare, only when my strength improves, can I do something, and I can explore some things." Lin Yun thought in his heart, facing the bitterness.

I saw that Xuan Ku's expression was a little stunned at this time, as if he didn't expect Lin Yun to be so decisive, and even said...... Just chewed the peony and swallowed it.

The next moment, his gaze became a little surprised, and he looked at Lin Yun as if he was looking at a monster.

And Lin Yun also discovered the abnormality of Xuan Ku at this time, and asked uncertainly: "Uncle Xuan Ku, is there anything wrong?" ”

Lin Yun's expression was a little cute at this time. After all, he didn't feel any surprises.

But at this time, Xuan Ku's expression was clearly shocked and stunned, as if he had seen something extremely incredible.

"What's the matter, isn't this a secret medicine, but another test?" Lin Yun thought in his heart and looked at Xuan Ku.

And Xuan Ku also restrained his expression at this time, and turned into a concern.

"Don't you feel that something is wrong?"

Lin Yun was stunned, something was wrong? Could it be that his guess just now is true, this is really a test, not a so-called secret medicine?

But in the face of Xuan's bitter questioning, he still responded: "Something is wrong? Nope! ”

Lin Yun said truthfully, at this moment, he really didn't feel anything wrong, and even said that he himself was wondering, if this was really a secret medicine, why would there be no reaction after eating it.

It's just that as soon as he finished answering, the whole person suddenly tensed, his pupils widened, and an unimaginable accident happened to him.

In an instant, it was like a raging flame, and a fatal burning sensation directly filled Lin Yun's body.

At this time, Lin Yun finally confirmed that the words of Xuan Ku just now were definitely not an exaggeration, let alone a lie.

This secret elixir...... It's really better to live than to die.

Lin Yun didn't know whether to say that he was stupid, or blamed Xuan for not finishing his words, and swallowed himself directly, resulting in such a painful situation now.

At this moment, Lin Yun's perception was as if he had been cut open by the skin, and after the flesh and blood were removed, he put his bones on the fire and burned them.

"It hurts!"

Lin Yun wailed, he was already in a state of emptiness, and he collapsed directly on the ground. He wanted to be unconscious, but this power was to sting his soul, so that he could forcibly keep his sanity, even if he wanted to escape this unborn pain, it was impossible.

Hearing Lin Yun's wail, his bitter expression also changed greatly at this moment, and he hurriedly exerted his Buddha power to check Lin Yun's situation. But what he didn't expect was that at this moment, Lin Yun's body seemed to have a natural barrier, directly shielding Lin Yun's body, even if it was his immortal ability, it was difficult to find out.

"Lin Yun, how do you feel?" Before he had time to investigate the source of this power, Xuan Ku asked softly.

From this voice, it can be heard that he is also anxious at this moment. After all, he never thought that Lin Yun would directly swallow this secret medicine. You must know that not to mention the body refining cultivator of the copper skin Dacheng, even the flesh body powerhouse of chalcedony and essence, he definitely did not dare to try to swallow it like this.

The reason why he left Lin Yun behind was that he had already planned to use Buddha power to escort him in the deep valley of this battle platform, and send this secret medicine to his body with soft power, so that it would dissipate in the blood and spread all over the blood and bones, so as to dissipate the medicinal power, temper the bones, and make them as hard as iron.

It's just that now that Lin Yun's impulse has directly broken the plan in his heart, he doesn't even have time to react more to make amends.

"Strange, really strange." Xuan Ku muttered in a low voice, his eyes hesitant.

What was strange to him was that at this moment, there seemed to be some kind of power in Lin Yun's body that he didn't know. This power is extremely peculiar, just a moment ago, he actually isolated himself from exploration, and now, it has replaced the function of Buddha power, and the secret medicine that Lin Yun has already swallowed, wrapped and escorted.

Yi Xuan could only do it, although he couldn't directly probe Lin Yun's body, but he already felt that the power that had emerged from his body at this time had already been known.

This...... It is clearly a manifestation of burning bones in the fire and refining bones like iron.

Between the groans, Xuan Ku's eyes looked at Lin Yun a little more peculiar, a little dignified.

And for these, Lin Yun, who was in the whirlpool of pain, did not perceive it at all.

At this moment, he was like a sharp arrow in his heart, on his skin, in his flesh and blood, bursting out of rockets one after another, directly acting on his muscles and bones. Every power that emanated made him feel the pain of the Dao in his soul.

What's more, at this moment, he seems to be able to look inward, and he can see the power of this Dao acting on his body, first the muscles and bones of his hands, then his arms, then his body, and finally his legs and feet.

Almost on my own, there is not a single omission. It is even said that these forces will explode at the same time in an instant. That feeling is like steel nails embedded in the flesh and bones, which makes people heartbreaking.

But the pain ...... But it is directly proportional to the effect.

From beginning to end, from the time Lin Yun swallowed the secret medicine to the time he endured this inhuman pain, his consciousness was clear, and he could clearly feel that his bones were getting harder and harder under this intense pain.

"Iron bones?" Lin Yun endured the pain and thought in his heart.

At this time, his realization seemed to be all over the meridians around him, and through his flesh and blood, he could see that at this time, there were still sparks on the white bones.

This spark, nothing else, is exactly the medicinal properties of this secret elixir.

"Boning grass!"

In an instant, Lin Yun had a kind of realization in his heart, and guessed what the origin of this secret medicine was.

The Venerable Master Chengguang once told him that there are many ways to open up iron bones, one way is to follow the step-by-step process, after practicing the skin, then the flesh and blood, refining the muscles and veins, and finally the body bones.

But this tempering method, to put it bluntly, is to use Yuan Force to practice.

This method, while prudent, is arguably the most robust. But the only downside is that it's a long-term process. Moreover, no matter how ruthless a person is, how can he be willing to use Yuan Force to wash his bone marrow?

Therefore, the iron bone refined with Yuan Li is not strong.

Therefore, in the general cultivation of the body, external forces will be used to stimulate the bones, so as to open the iron bones.

And this so-called external force is nothing more than an elixir. Born with all things, there are no longer a few elixirs that can stimulate bones, sword leaf grass, five poisonous flowers, and chaotic corpse fruits...... And so on, all of them have such effects.

But boning grass is the most intense, and the effect is even more significant!