Cosmic Trading System

"Three and a half days..."

After figuring it out, Lin Yun lifted his head, his black pupils narrowing slightly.

It took him a total of three and a half days to refine the gray crystal, and from the look of things, he couldn't do this too often.

Otherwise, the time he had to challenge the Heavenly Principle Tower would be greatly reduced.

Whoosh!

With a thought, Lin Yun started to move forward and continue his journey.

At the same time, he observed the scenery of this level of the space.

He saw that it was a continuous range of high and majestic mountains, only they were filled with a chilling aura everywhere. Lin Yun guessed that this should be a mountain range with yin attributes, an ideal place where, according to legend, Ghost Practitioners thrive.

"To think that it can support Ghost Practitioners superior to the second realm of the super realm. I really wonder how this kind of environment came about. Or perhaps, is this just a simulation created by the Heavenly Principle Tower?" Lin Yun thought to himself.

After clearing forty-nine levels of the Heavenly Principle Tower, Lin Yun had some guesses about the various scenarios simulated by the tower. He estimated that even if these scenarios weren't real, they must be very plausible.

Before long, Lin Yun encountered another strong Ghost Practitioner. It was more powerful than the one before, but still within the second realm of the super realm. Moreover, this Ghost Practitioner appeared to be quite cunning, resorting to sneak attacks and using cunning strategies.

"Pfft!"

In the end, it took Lin Yun some effort to kill this Ghost Practitioner.

"That was not easy..." At the moment of the kill, Lin Yun couldn't help but sigh.

At the same time, he immediately covered the spot where the Ghost Practitioner fell with his Mental Strength, searching for that gray crystal...

"As expected!"

Very soon, Lin Yun's eyes brightened, and he felt pleased.

He did indeed find a gray crystal at the place where the Ghost Practitioner fell, about the same size as the one he found before.

With a thought, Lin Yun flashed to the side of the gray crystal and in the next instant, grabbed the crystal in his hand.

"Exactly the same!" Lin Yun said with a slight smile.

"I should refine this gray crystal first! The second Ghost Practitioner was already not so easy for me to deal with. It was still within the second realm of the super realm. If I encounter a Ghost Practitioner of the third realm later, or if I come across two at once, it will definitely be even more difficult..."

"An improvement in the level of Mental Strength will make it easier for me to deal with these Ghost Practitioners' mental attacks and also speed up all of my responses. As the saying goes, sharpening the axe will not delay the work of cutting wood. Spending more time now, in the grand scheme of things, might not actually waste that much time..." Lin Yun pondered for a moment, thinking to himself.

Whoosh!

Lin Yun sat cross-legged on the ground and began refining the gray crystal once more.

The quantity and quality of his Mental Strength once again surged dramatically.

"Hum—hum—hum—"

While Lin Yun was refining the gray crystal, the Bloodthirsty Sword resting on his knees sent out flickering blood-red glows and vibrated intensely, emitting light humming sounds.

Lin Yun paid no attention to it, as the Bloodthirsty Sword had reacted like this the last time he refined a gray crystal.

He believed it was a natural reaction of the Bloodthirsty Sword when there was a significant change in the power within his body.

After all, the power of the Bloodthirsty Sword was merging with his own, so its reaction to his sudden surge in Mental Strength was quite normal.

"Boom—hoo—hoo—hoo—"

However, this time, before Lin Yun had refined much Spiritual Energy, the blood-colored glow emitted by the Bloodthirsty Sword suddenly intensified. A powerful force surged from within the sword into Lin Yun's body, swiftly sweeping up a vast amount of Spiritual Energy back into the sword. Afterwards, the Bloodthirsty Sword released an even stronger blood-colored glow.

"What?"

Lin Yun exclaimed in shock, quickly opening his eyes and looking uncertainly at the Bloodthirsty Sword on his knees.

All this time, it had always been him doing the killing, with the Bloodthirsty Sword absorbing the vital blood force from the victims. Then, a portion of that blood force would be absorbed by the Bloodthirsty Sword itself to enhance its power, with another part benefiting Lin Yun, strengthening his own power.

There had never been an occasion when his own power, increased by heavenly treasures, would also be absorbed by the Bloodthirsty Sword.

"Boom!"

Lin Yun stood up and immediately grabbed the Bloodthirsty Sword from his knees. His power enveloped the sword, allowing it to hover in front of him while separating it from his own power.

"Little Blood! How dare you absorb Brother Lin Yun's power!"

"Little Blood, how could you do this?"

At the same time, angry voices from Little White and Little Blue resonated from within the Bloodthirsty Sword. Soon after, three orbs of light chased and attacked each other within the sword, fighting amongst themselves.

"Little White, Little Blue, what's going on?" Lin Yun asked with a stern voice.

The Bloodthirsty Sword was undoubtedly a very heaven-defying magical weapon. The fact that it was losing control now was not a good sign, especially since Little White and Little Blue were also inside it, supervising.

Lin Yun did not believe Little White and Little Blue were conspiring with the sword spirit inherent in the Bloodthirsty Sword.

"Brother, just now, Little Blood suddenly detached from its connection with me and Little Blue and absorbed your power..."

"Brother, it's our fault we didn't keep a close eye on it. Don't worry, we will keep a strict watch on it from now on and won't let it act recklessly..." Little White and Little Blue promptly said, sounding very indignant.

"What's Little Blood's power like now? Can you two keep it in check?" Lin Yun asked with a frown.

This question was of great importance. His current strength came from integrating with the power of the Bloodthirsty Sword. If he could not merge with the sword's power, fighting the Ghost Practitioner he had encountered earlier would not be easy.