When Mo Tianyun saw Lieyang's current appearance, which was as chubby as a round ball, he found it kind of cute and couldn't help but smile.

"Lieyang, look how fat you've become! It seems you've been consuming a lot of matter and energy lately!"

Mo Tianyun said with a smile.

"Master, please stop making fun of me. I didn't gain weight from eating too much."

After saying this, Lieyang immediately opened his mouth, and the black vortex gradually expanded, covering tens of thousands of kilometers ahead.

What is this for?

What's so surprising?

Mo Tianyun waited quietly.

The next instant, Mo Tianyun saw Lieyang spit out a dark crystal block with a volume comparable to Lieyang's body.

The surface of this dark crystal block is covered with wisps of light. It is dark inside, but it shines under the light, and it has a bit of crystalline luster.

As the massive, dark crystal, spanning tens of thousands of kilometers, was released from Lieyang's body, Lieyang's body visibly shrank, its original spherical shape disappearing and gradually returning to its normal appearance.

Mo Tianyun now understood that the reason Lieyang was so fat was because it had a crystal inside its body.

However, the body of the blazing sun is millions of kilometers long. How could a mere black crystal with a diameter of tens of thousands of kilometers cause the body of the blazing sun to expand like this?

Mo Tianyun slowly calmed himself down and used his mental power to examine the black crystal in front of him.

This substance was found to have an extremely high density, surpassing even the density of neutron stars, which are among the densest celestial bodies in the universe.

With a thought, he took a step forward and landed on Lieyang's head. "Lieyang, what is this black crystal? Where did you get it?"

"Hehe, Master, just attack that crystal with all your might and you'll see. It'll definitely give you a shock!"

Lieyang was very happy, but kept everyone in suspense.

"Let me attack? So you mean this crystal can withstand my powerful attacks?"

Mo Tianyun was slightly taken aback, looking at the black crystal floating in the space in front of him with some doubt.

If he attacks with all his might, he can break through the shield on the surface of the Miracle Mech. If this happens several times, even the main body of the Miracle Mech will not be able to withstand it.

However, the core of the miracle can definitely withstand it.

"Okay, I'll give it a try."

After saying that, Mo Tianyun pushed off with both feet, leaving the top of the blazing sun and flying towards the black crystal.

Mo Tianyun did not use any martial arts techniques; instead, he casually condensed a spiritual longsword.

Go!

With a single palm strike, Mo Tianyun infused most of his spiritual energy, along with all of his own power.

puff!

The spiritual longsword may appear small and exquisite, but it contains immense power. With a single swift strike, it leaves a long afterimage, slicing through the sky and piercing a distance of millions of miles before striking the surface of the black crystal.

bump!

The black crystal trembled slightly and was propelled forward several hundred kilometers, but its surface remained completely undamaged.

In contrast, Mo Tianyun's spiritual sword had already crumbled and dissipated.

"Huh! This crystal is quite hard."

Mo Tianyun realized that the crystal was remarkable for withstanding his sword strike and began to take it seriously.

If it were a very weak first or second-tier insect emperor, and it had been hit by Mo Tianyun's sword just now, it wouldn't have died, but it would definitely have suffered a great loss.

However, the black crystal remained stable and intact, demonstrating its exceptional strength.

Next, Mo Tianyun gradually increased his attack power, testing it little by little.

Thousands of Starlight Swords!

useless.

Kamehameha Spiritual Power!

The black crystals are still fine.

"I refuse to believe it! I can't destroy this crystal!"

"Miracle: Sword Domain Galaxy!"

Countless colorful sword lights converged, like a surging galaxy and rolling nebula, rushing towards the black crystal in unison.

At the moment of their collision, the close-up light still shattered, and the colorful sword light that scattered everywhere resembled a sky full of stars, overlapping with the bright stars in the sky, making it impossible to distinguish between stars and sword light.

When the starry sky before us returned to tranquility, the black crystal, which had been blasted tens of millions of kilometers away, floated there blankly, its surface sparkling and clear, showing no signs of having been attacked.

Mo Tianyun fell silent for a moment...

this……

What exactly is this crystal?

His heart was like a turbulent sea, churning and surging, an endless ocean overturning and churning.

Seeing the blazing sun in the distance brought me immense joy.

In its memory, its master's emotions had rarely been so intense.

The last time the master was happy was when I took him to the white hole space in the universe.

For over a thousand years since then, even though its master cultivated diligently and became incredibly powerful—a thousand times, ten thousand times stronger than when it first met—it remained completely unmoved.

Lieyang really couldn't understand it. Was it not a happy thing to be just barely strong?

How can the owner still remain calm and composed?

This time, it finally sensed the turmoil in its master's heart, and Lieyang felt it was all worth it.

Finally, Mo Tianyun stopped hesitating and took out the Divine Mech. With the mech's maximum power boost, he used a Thousand Starlight Sword to barely blast a huge hole in the crystal in front of him.

From this, Mo Tianyun came to a conclusion.

That is, the strength of this material is extremely high, enough to serve as a material for manufacturing the Heavenly King Battle Mech, as well as a galaxy-level material for upgrading the Divine Mech.

Especially with such a large piece of black crystal material in front of him, although it wasn't quite enough to upgrade the Divine Mech, Mo Tianyun had already prepared another set of materials. This black crystal, combined with the galaxy-level mech manufacturing materials, would definitely be enough.

However, Mo Tianyun's mecha manufacturing technology has been stuck at a bottleneck and is difficult to break through.

He can't upgrade the Miracle Mech, a primitive combat mech, to the level of the Star God combat mech in the short term.

Although the simulation space assisted in the mecha manufacturing process, allowing Mo Tianyun to avoid spending a lot of materials on experiments in reality, the technology of the Tianwang combat mecha was too advanced for Mo Tianyun to master.

The Heavenly King Battle Mech is a battle mech controlled by a high-level life form like a Star Domain Level expert. Its structure is far too complex, tens of thousands of times more complex than the Star God Battle Mech, or rather, the two are not even on the same level, making it extremely difficult to quantify and measure.

Most importantly, even with the blueprints for manufacturing the Heavenly King combat mechs in the core space of the miracle as a reference, and relying entirely on his own exploration, Mo Tianyun was still completely baffled.

This is like a novice mecha engineer receiving blueprints for an epic combat mecha and all the necessary materials. Does he have the skill to replicate it? No!

"Lieyang, stop keeping me in suspense and tell me, where did you get this black crystal?"

Then, Mo Tianyun asked.

"Hehe, Master, it's far away, yet right before my eyes!"

Lieyang's words startled Mo Tianyun slightly.

Mo Tianyun pondered for a moment, and then seemed to realize something, staring intently at Lieyang: "You mean, this black crystal was produced from your body?"

"Yes, congratulations, Master, you got it right!"

The head of the blazing sun, radiating colorful flames, nodded.

"How did your body produce those black crystals?"

Mo Tianyun asked curiously.

“Master, you are unaware of this. Some time ago, you ordered me to devour the Dylan Galaxy so that I could quickly evolve into a true Source Beast.”

"After I devoured a large amount of celestial matter, my body accumulated a lot of substances. Some of these substances were very hard and I couldn't digest them with the source fire, so they accumulated inside my body. After being constantly tempered by the source fire, this black crystal was produced inside my body. I also discovered that this black crystal is very strong, so I thought I'd bring it over for you to see!"

The blazing sun began its story in a gentle, detailed manner.

Mo Tianyun then understood.

Since Lieyang evolved into a Level 7 Star Beast, the source fire emanating from its body has developed a destructive ability. It possesses extremely strong destructive power and can easily burn up super materials, which are substances with extremely high strength.

Therefore, a substance that even the source fire cannot burn must have very high strength.

Like the core metal of a large neutron star, or the metal left behind at the center of a superstar after an explosion...

These substances have undergone millions of years of smelting, compression, and fusion, resulting in inherently high strength.

In addition, Lieyang's body is like a material reforging furnace, using the burning and destructive power of the source fire to continuously refine these materials, forming this black crystal.

It's not surprising that this black crystal is of galaxy-level material quality.

There's another thing Mo Tianyun is curious about: if Lieyang evolves into an 8th-level source beast, then the destructive power of its source fire will definitely be stronger. At that time, he wonders if it will still be able to generate black crystals by devouring certain celestial matter.

If more of these black crystals can be formed, then after being smelted and refined by the more destructive source fire, the strength of these black crystals will definitely be even more astonishing, and may even surpass the strength that galaxy-level materials should have...

Mo Tianyun simply couldn't believe it!

He looked at the blazing sun and felt that it was becoming more and more endearing and lovable...