Mortal blood!

Lin Fan frowned slightly, flipped his palm, and took out the mysterious copper bottle directly.

However, when he compared the mysterious copper bottle with the branches of the five elements spirit wood, he found that the branches of the five elements spirit wood were actually two feet long. Although the mysterious copper bottle has a strengthening effect, it cannot completely hold the five elements spirit wood.

"I wonder if the strengthening function of the mysterious copper bottle can still be successful if most of the five elements spirit wood is exposed outside?"

Lin Fan was secretly curious.

While speaking, he put the mysterious copper bottle into the Spirit Eye Spring without hesitation.

The Spirit Eye Spring in front of him was about ten feet in size.

The pure spiritual energy of heaven and earth in it was extremely abundant, like a clear spring.

The misty air floated above the spiritual spring, like a quiet fairy pool.

When Lin Fan put the mysterious copper bottle into the Spirit Eye Spring, he found that the flower pattern on the mysterious copper bottle kept flashing.

The majestic spiritual energy of heaven and earth in the Spirit Eye Spring gathered together in a flash. In just two or three breaths, it absorbed one tenth of the pure spiritual energy in the Spirit Eye Spring.

"This... What a fast speed!"

Lin Fan exclaimed. Just when he thought that the mysterious copper bottle would stop completely after absorbing so much spiritual energy, the winding flowers on the mysterious copper bottle suddenly lit up again.

Soon, a lot of spiritual energy was sucked into the mysterious copper bottle.

This strange change made Lin Fan suddenly surprised.

But he was not in a hurry. He waited for the mysterious copper bottle to completely absorb the spiritual energy of heaven and earth nearby, and then he casually fished out the mysterious copper bottle in the Spirit Eye Spring.

The moment he took it in his hand, Lin Fan's wrist sank slightly.

At this moment, Lin Fan clearly felt that the mysterious copper bottle in his hand was thousands of times heavier than before.

It was like a huge rock of more than a hundred feet in size, pressing between his palms.

If his physical strength was not much stronger than that of an ordinary Yuanying early stage cultivator, he would have broken his wrist if he was not careful.

"This..."

Lin Fan was amazed.

His divine sense and clear eyes swept towards the mysterious copper bottle at the same time.

At this moment, Lin Fan discovered that there was a pool of mysterious green liquid in the mysterious copper bottle, lying quietly in the mysterious copper bottle.

When Lin Fan's divine sense fell on the mysterious liquid, he clearly felt a majestic vitality and a strange and powerful aura emanating.

"Are these liquids the key to the copper bottle strengthening various things? But why have I never noticed this before?"

Lin Fan frowned and thought seriously for a long time. It seems that he has guessed the answer, but the cautious Lin Fan did not dare to be careless.

After a little thought, Lin Fan took out a replica of Tongtian Lingbao that had not been strengthened and put it directly into the mysterious copper bottle.

Huh!

A faint spiritual light flashed at the moment when the replica of Tongtian Lingbao was put into the copper bottle.

Then, the imitation of the Tongtian Lingbao, which was only 50% of the original, unexpectedly increased its power by 20%.

At the same time, the mysterious liquid in the mysterious copper bottle seemed to have decreased by a full one-third.

"It is exactly as I guessed. These mysterious liquids are the key to strengthening everything. If so, I will strengthen the five elements spirit wood first."

Lin Fan looked ecstatic.

He did not dare to be careless at this moment.

With a careful move, a drop of thumb-sized mysterious liquid was drawn out of the mysterious copper bottle, and then carefully dripped on the surface of the five elements spirit wood.

Buzz!

A faint emerald green fluorescence appeared on the surface of the five elements spirit wood as the mysterious liquid infiltrated into the five elements spirit wood.

Lin Fan, who was standing aside, clearly saw that the five elements spirit wood, which was originally two feet long, had become more than three feet long. The branches, which were originally as thick as the head of a chopstick, had become as thick as a thumb.

The spiritual energy emanating from it was also a bit richer than before.

"I seem to have found another wonderful use for the mysterious copper bottle."

Lin Fan was secretly ecstatic.

While speaking, he tried to take out two drops of mysterious liquid again and dropped them directly on the five-element spirit wood.

While the fluorescence appeared, the mysterious liquid droplets were quickly absorbed by the five-element spirit wood.

At this moment, the five-element spirit wood turned into a size of several feet, as thick as a child's arm.

Even in some places, a lot of side branches spread out.

The vitality inside was obviously a bit stronger than before.

Although it still took a long time to grow into a complete five-element spirit wood and produce five-element spirit fruits.

But Lin Fan believed that as long as he persisted in using the mysterious liquid droplets in the mysterious copper bottle to strengthen the five-element spirit wood, it would not take long before the five-element spirit wood in front of Lin Fan could be used by him.

"The heavenly aura wrapped around the five-element spiritual wood is of great benefit to improving the cultivation qualifications of the immortal cultivators. I am a mortal blood. If I use the heavenly aura to wash my marrow for a long time, my cultivation speed will definitely be much faster than before. This benefit is priceless for me."

Lin Fan's heart suddenly became hot when he thought of this.

Seeing that there were still many mysterious drops in the mysterious copper bottle, he continued to drip on the five-element spiritual wood.

The number was also increasing little by little.

What surprised Lin Fan was that when he increased the number of mysterious drops to ten at a time, the five-element spiritual wood seemed not to be strengthened, but the lush branches and leaves turned yellow in an instant.

After thinking carefully for a while, Lin Fan once again dripped the mysterious drops on the five-element spiritual wood.

This time the number was exactly ten drops.

As a result, the strengthening effect this time was very significant.

The five-element spiritual tree was obviously a fist thicker than before.

The side branches on it became more luxuriant.

The tender green branches and leaves actually emitted five-color spiritual light, which was dazzling.

"It seems that when using the mysterious copper bottle to strengthen the spiritual wood, the amount needs to be controlled. You can't pour too much at a time. Otherwise, the opposite will happen." Lin Fan said secretly.

Thinking that this situation did not seem to occur when he used the mysterious copper bottle to strengthen the spiritual medicine before, Lin Fan frowned.

But soon, he laughed again.

"In the past, there were very few mysterious droplets in the mysterious copper bottle. I'm afraid there was only a thin layer attached to the surface of the mysterious copper bottle. In this way, it was quickly absorbed by the natural materials and treasures in the mysterious copper bottle. Naturally, I don't have to worry about the problem of too much."

"But now, the number of mysterious droplets produced in the mysterious copper bottle has increased, and I must control the amount to use."

Thinking of this, Lin Fan's mind suddenly became clear.

Next, he tried to drop the mysterious liquid on the talisman and the imitation of Tongtian Lingbao. When he saw that his guess was correct, Lin Fan stopped trying.

"With the existence of the mysterious liquid, I don't have to show the mysterious copper bottle in my hand to others easily. This is an extra layer of security for me."

Lin Fan muttered.

He put the mysterious copper bottle into the spring of the spiritual eye and let it automatically produce a large amount of mysterious spiritual liquid. After continuing the experiment, Lin Fan called Linghu'er over.

"Master, what do you want to see me for?" Linghu'er looked at Lin Fan curiously, but her eyes kept looking at the five-element spiritual tree that was dozens of feet high, and her beautiful eyes were full of surprise.

Lin Fan did not explain, but handed dozens of jade bottles to Linghu'er.

"Hu'er, you use the spiritual liquid in these jade bottles to fill the five-element spiritual wood every day. Remember to only drip ten drops each time." Lin Fan said with a serious face.

"Yes, master!"

After Linghu'er agreed, she quietly waited beside the five-element spiritual wood.

Lin Fan's figure flashed, and he left the cave and headed straight for Qingchen Market.