Naturally, Yu Xi wouldn't know that Mo Sang was going to come to her for help.

However, Mo Sang's guess this time was good, Fei Xi was indeed in the waterfall area, and the place where she was located was not elsewhere, it was the hidden cave behind the waterfall.

The waterfall area was bustling with activity in the days after she took away the marrow of the golden thunder, and there were many treasure hunting teams here, and there were even more battles as a result.

I don't know how many innocent souls are buried under the raging golden waterfall.

However, it soon became clear that the treasure had been taken away.

Then, as the surrounding demonic energy began to gather here, the waterfall area, which had nowhere to hide and no elixir to collect, became deserted.

Later, after the adventurous team in the Golden Thunder Secret Realm was exhausted by the demonic energy, no one came here again.

After Yu Xi won the marrow of the Golden Thunder, he immediately went to the top of the Golden Thunder Peak on the other side to collect the golden thunder leaves that were still missing.

After killing countless demonic beasts and demon beasts along the way, and purifying countless demonic qi, she finally gathered the remaining golden thunder leaves.

In this way, she no longer deliberately searched for treasures in the Golden Thunder Secret Realm, where there was more and more demonic energy, but returned to the cave behind the waterfall to make some arrangements, and began to concentrate on refining the eleventh string, and then fused to improve the level of the heavenly spirit.

As for her own strength, she has now reached the peak of spirit building, and if she goes any further, she will have to break through the Spirit Tribulation to the Spirit Period.

This is a large stage of strength improvement, the eleventh string is not a special ninth string, after the fusion, it will only improve the grade of the heavenly spirit, and it will be of little help to the improvement of her strength.

And Fei Xi doesn't plan to spend time in the Golden Thunder Secret Realm.

Therefore, during the ten days of retreat in the cave, she spent the first three days on refining and fusing the eleven strings, and spent the next seven days on alchemy and practicing zheng.

Alchemy is to refine the elixir materials she obtained during this time into pills, first, to save space, second, to sell at a higher price after going out, and third, to refine @Dan to assist in breaking through the agility.

Practicing the piano is naturally to practice the peak of building the spirit and live the immortal song - "Fierce Phoenix".

In addition, Fei Xi will also record various tunes with recording stones to form different grades of healing sound stones.

The healing sound stone that is played by ordinary zither only incorporates a trace of light and spiritual power, which is the kind that is now rushed to be sought on the market.

The second is to play the music with an ordinary zither, but when playing, it is deliberately played with light and spiritual power.

This was followed by the regular music played by the Yuzuki Zheng, the Xiyue Zheng played the awakened Xianyin mode song, and the string notes of the talent mode were recorded separately......

After recording in various situations, the sound stones with different effects and effects are used up, but the sound stones that the concubine brought out of the peach blossom collar are all used up.

Of course, due to the influence of the promotion of the Heavenly Spirit, the healing sound stones recorded by Yu Xi now are all light green, like jade, crystal clear and charming.

After the successful fusion of the eleven strings, her heavenly spirit finally entered the green grade.

And the elf Xixi finally has another transformation mode, that is, it turns into a golden-green oval shape, which looks like a lemon.

You Xi thinks it's cute, but Xixi feels silly and doesn't like to be like this at all.

However, it can't be transformed back immediately after it has been transformed.

So it could only bounce around the cave in a huff and complain: "I hate it...... I hate to become a ball......"

"Master, master, the nest quickly collects and refines other zither strings, and you have to change your clothes at night, change your clothes!"

"Master, master, the nest is going to loot all the stinky old man's spirit storehouse, loot!"

……