Lin Yuan's own spiritual creature affinity is towards healing spiritual creatures, auxiliary spiritual creatures, and plant spiritual creatures.

However, although Lin Yuan is a healing assistant, he has a heart for output.

Lin Yuan's choice of cultivating the source organism red thorn.

Directly cultivate the red thorn source seed towards the direction of a combat-type spiritual creature.

Just by looking at the Red Thorn evolving into its current form, one can see how persistent Lin Yuan is in output.

But now Lin Yuan did not expect that his sister Chu Ci was the same as himself. As a defensive spiritual professional, she controlled a big iron bull and was obsessed with output.

They really are not from the same family and they don't even enter the same house.

Lin Yuan strengthened the bronze-grade Rhino-horn Iron Bull. If he wanted to upgrade the quality of the bronze-grade Rhino-horn Iron Bull to legendary quality, it would take more than five days.

These five days were enough for Lin Yuan to strengthen the Rhinoceros Iron Bull by himself in the breeding room.

At this time, there was a bell ringing at the door of the breeding room.

On weekdays, if there are creators cultivating spiritual creatures in the creator's cultivation room, no one will disturb them.

So when the bell at the door of the breeding room rang, Lin Yuan knew that it was Master Ning who came.

When Lin Yuan came to see Chu Ci, he just wanted to send the Silver Core Golden Honey to Chu Ci, and at the same time sign a contract with Chu Ci with the Steel Butterfly that he had cultivated before.

I never thought that Chu Ci would actually comprehend the rune of will.

If the quality of the Rhinoceros-Horn Iron Ox is to be upgraded to legendary quality, some spiritual materials are needed. However, since the matter happened suddenly, Lin Yuan did not prepare these spiritual materials in advance.

So when he visited Mr. Ning just now, Lin Yuan asked him to see if there were any spiritual materials needed to improve the quality of the Rhinoceros Horn Iron Bull in the material room of the Bauhinia City Makers' Union.

Lin Yuan opened the door and saw Mr. Ning standing at the door.

At the same time, Lin Yuan saw that next to Mr. Ning was Ning Xuejun, who had received him when Lin Yuan took the Maker Assessment at the Bauhinia City Maker Union.

Ning Xuejun is also the granddaughter of Mr. Ning.

At this time, Ning Xuejun was holding a bronze soul-trapping box in her hand.

When Ning Xuejun saw Lin Yuan, she nodded and greeted him, with a look of surprise in her eyes.

Ning Xuejun was deeply impressed by Lin Yuan, because someone like Lin Yuan who scored full marks in three knowledge-based, life-spiritual professional level one exams at once was unique in the Huiyao Federation.

When Ning Xuejun saw Lin Yuan again, she was surprised that Lin Yuan's temperament seemed to have changed a lot compared to before.

Old Ning looked at Lin Yuan and said with a laugh.

"Yuan boy, I have already prepared all the spiritual materials you requested."

Lin Yuan can finally feel relieved now. At least he doesn't have to waste time collecting the spiritual materials needed to upgrade the quality of the Rhinoceros Horn Iron Bull to legendary quality.

Lin Yuan touched the back of his head and smiled brightly.

"Thank you for your concern, Mr. Ning."

To upgrade the quality of the copper-grade rhinoceros iron bull to legendary quality, a large amount of manganese iron ore and metal essence is required.

Manganese iron ore and metal essence are not very rare spiritual materials.

Metal essence is the crystal left after a large amount of metals are mixed together and forged at high temperature.

Manganese iron ore is a dark blue flaky metal found deep in the earth.

Manganese iron ore is extremely hard, and if you touch it with your hands, your fingers will feel a sharp metallic tingling sensation.

There are two kinds of spiritual materials, metal essence and ferromanganese ore. Of these, five hundred kilograms of metal essence are needed, while two thousand kilograms of ferromanganese ore are needed.

The price of metal essence is about two Brilliant Coins per kilogram, while manganese iron ore requires nearly eight Brilliant Coins per kilogram.

If it were in the past, Lin Yuan really wouldn't be able to take out nearly 20,000 Brilliant Coins all at once.

However, since he had the massive amount of Brilliant Coins in the centipede beetle-shaped soul-trapping box, Lin Yuan no longer had to be restricted when buying spiritual materials for cultivating spiritual creatures. He could just buy them and use them directly.

Ning Xuejun handed the bronze soul-trapping box to Lin Yuan, and at the same time looked at Chu Ci who was beside Lin Yuan.

Ning Xuejun could tell at a glance that Chu Ci was Lin Yuan's sister, even though Chu Ci and Lin Yuan had completely different temperaments.

Lin Yuan is the kind of boy who is full of sunshine and makes people feel like they are in the spring breeze.

Chu Ci, on the other hand, was quiet yet a little cold. Although he had a smile on his face, he seemed to be slightly detached from everything except Lin Yuan.

The resemblance between their eyebrows and eyes shows that they are blood relatives.

Ning Xuejun extended her hand in a friendly manner and greeted Chu Ci.

Chu Ci was startled, then he smiled slightly and shook hands politely with Ning Xuejun.

Seeing this, Mr. Ning looked at Chu Ci and laughed.

"Yuan boy, you are cultivating spiritual creatures in there and can't take care of this little girl. Why don't I take the little girl out and let my granddaughter accompany her around."

It just so happened that Lin Yuan had been thinking about strengthening his spiritual creatures, and he couldn’t let Chu Ci stay in this breeding room bored all the time.

For five days, Lin Yuan needs to concentrate on cultivating the spiritual creature. If he were to leave Chu Ci aside, Lin Yuan would really feel reluctant.

Now that Chu Ci is with Old Ning and Ning Xuejun, Lin Yuan feels more at ease.

Chu Ci turned to look at Lin Yuan, and after Lin Yuan nodded, he followed Old Ning and Ning Xuejun out of the training room where Lin Yuan was.

Now Lin Yuan is the only one left in the breeding room.

There is no wrong version in the 1619 book forum!

Lin Yuan also took out the metal essence and manganese iron ore stored in the copper-level soul-trapping box that Ning Xuejun had just handed over to him.

Then he touched the horns of the rhinoceros iron ox and said.

"Iron Lump, go eat these metal essences and manganese iron ore, and then I will improve your quality."

Although the Rhino-horn Iron Bull was not as intelligent as Yin Yin, it could still understand what Lin Yuan said.

After understanding Lin Yuan's meaning, the Rhinoceros Iron Bull immediately snorted excitedly and hurriedly began to eat the metal essence and manganese iron ore that Lin Yuan placed on the ground.

Although this metal essence weighs 500 kilograms and this ferromanganese ore weighs 2,000 kilograms, it sounds like a lot.

However, since both metal extract and ferromanganese ore are very dense, they are extremely heavy.

So the metal essence and ferromanganese ore don't seem to be much in reality.

Just as the Rhino-Horn Iron Bull was happily eating the metal essence and manganese iron ore, Lin Yuan looked at the Rhino-Horn Iron Bull and smiled softly.

In Lin Yuan's opinion, getting the severely injured and endangered elite epic quality Rhinoceros Rock Ox was a huge bargain and an excellent spiritual creature.

But now that Lin Yuan is rich, he can easily buy many defensive spiritual creatures that are better than the elite epic quality Rhinoceros Rock Ox.

Fortunately, the skill that the elite-level Rhinoceros Rock Bull comprehended at the elite level was sacrifice.

Because of the sacrifice of this rare skill, the Rhinoceros Iron Bull is directly superior to most defensive spiritual creatures.

When Lin Yuan had just recovered and could feel the spiritual energy, he had no time at all to accumulate resources.

So it was really difficult for Lin Yuan to prepare a defensive spiritual object for Chu Ci.

But as a brother, Lin Yuan has a clear conscience.

For Lin Yuan at that time, that sentence was true.

“What I give you may not be the best, but it is the best I can give you right now.”

The Rhino-Horn Iron Bull has undergone a great transformation due to the sacrifice of its skills.

And now the Rhinoceros-Horn Iron Ox is about to undergo the second transformation in its life. This transformation is also an extremely important sublimation in Chu Ci's life.

Lin Yuan's spiritual power circulated rapidly, and the pure spiritual energy was quickly absorbed by every cell in the Rhino-Horn Iron Ox's body.

The cells of the Rhinoceros Iron Bull seemed to be activated by the pure spiritual power. It became hungry and scrambled to absorb the energy from the metal essence and manganese iron ore in its stomach.

Time flies, and Lin Yuan basically didn't have any rest in the past five days.

At this moment, the rhinoceros-horned iron ox suddenly mooed.

The Rhinoceros Iron Bull's original height of nearly three meters had now suddenly increased to three and a half meters, becoming even stronger.

The horns on both sides of the bull's head and the rhino horn on the forehead are sharper and flash with a cold metallic light.

At this time, the quality of the bronze-grade rhinoceros-horn iron ox was finally upgraded to legendary quality by Lin Yuan.

The next step is to wait for Chu Ci to fuse the will rune and the Rhino-Horn Iron Bull, allowing the Rhino-Horn Iron Bull to evolve into a fantasy species.

The third update~the last update today! 　 (End of this chapter)