Immortality: Starting with a grave, I'm invincible when burying corpses.

Peaceful times always pass quickly.

Perhaps it was because too many changes had occurred in the Nine Realms recently, or perhaps it was because the appearance of Xuan Yuan Wu Mu gave Mu Ling'er new hope.

This time, Mu Ling'er did not leave Qing'an Prefecture immediately after finishing her business as before, but stayed at the Mu residence for a long time.

A home where one has lived for hundreds of years is bound to hold deep emotional significance. Every table, chair, and bookshelf in the Mu residence holds countless memories for Mu Ling'er.

This is where she has lived since childhood, and it holds countless beautiful memories for her.

The osmanthus tree in the courtyard has grown taller and taller, and now it shades the entire courtyard.

A towering tree, over thirty meters tall, stands in the center of the courtyard. When a strong wind blows, the courtyard is covered with a golden carpet.

In the past few years, Mu Ling'er's favorite thing to do was sit under the tree, either eating snacks with Mu An or discussing matters about the Spirit Realm with Xuan Yuan Wu Mu.

In her spare time, Mu Ling'er also raised a golden spirit cat, a gift from the Demon Saint of the Myriad Spirits Domain, which is said to have an extraordinary bloodline.

The civet cat wasn't big; it was just a tiny kitten when it was brought to us. Several years have passed, and it has grown a bit, but it's still only the size of a palm. Like any ordinary cat, it loves to jump around.

Because the civet's fur is predominantly golden, Mu Ling'er simply gave it the nickname "Little Gold".

Like cats, cats follow their owners. The osmanthus tree in the yard, which blooms all year round, has become Xiao Jin's favorite spot. From time to time, it can be seen wandering through the rain of flowers, playing hide-and-seek with Mu Ling'er when she has nothing to do.

Mu An often saw Mu Ling'er standing under the tree, teasing Xiao Jin with a feather from a blue phoenix.

Sometimes, Little Gold would hide among the lush foliage, and Mu Ling'er would lure it with food.

If Xiao Jin still refuses to come down, Mu Ling'er will pretend to be fierce and make faces at Xiao Jin until Xiao Jin jumps down from the tree, and only then will she stop.

Whenever Mu An sees such a scene, she feels as if time has turned back to the past.

Back then, the Mu family mansion was also full of life, always filled with Mu Ling'er's laughter.

The difference is that the spirit deer that used to play with Mu Ling'er has long since passed away. The little golden deer, only the size of a palm, spends most of its time nestled in Mu Ling'er's arms and can no longer carry her around like the spirit deer used to.

Mu An vaguely remembered that Xiao He and Mu Ling'er were quite mischievous back then. Whenever Mu Ling'er did something bad, Xiao He would chase after her and beat her up.

As a child, Mu Ling'er was not the kind of child who would obediently accept a beating. Every time Xiao He chased her, she would ride on a deer and run away. Xiao He would also play around with her, riding on a mother deer and chasing after her. The two of them and the two deer would often run around the Mu residence.

Back then, the Mu family mansion was far from being as grand as it is now. After running for a short while, they reached the end of the mansion, and Da Hua and Xiao Hua could only carry the two of them around the mansion.

The two spirit deer were also clever; they knew their master was just playing around, so they always kept a proper distance and wouldn't actually let Mu Ling'er be caught by Xiao He.

Every time, by the end, the two of them, one big and one small, would lean against the wall, panting, staring at each other for a moment before shaking hands and making up, finally laughing together from ear to ear.

After a while, even someone as good-natured as Xiao Lü couldn't help but scold the two of them.

He is a person of status and position, how can he ride a deer around the mansion like that?

call--

How long ago was this? And how did I feel back then?

In a daze, Mu An thought of this question.

He thought and thought, but he still didn't have a clear answer.

Sitting in the small pavilion surrounded by flowing water, Mu An smiled and shook his head. He looked around and took in the entire Mu residence.

White walls and green tiles, surrounded by lush bamboo, lanterns hanging everywhere, and blooming flowers everywhere, with golden osmanthus trees swaying in the wind.

Everything seems unchanged, yet everything also seems to have changed a great deal.

……

"Senior Ling, regarding your suggestion of using primordial energy instead of spiritual energy as the energy source to drive the formation, I, Wu Mu, have also made some attempts over this period of time, but I still haven't achieved any results. I think this matter is too complicated. If we really want to explore its feasibility, we still have to consult with you, Senior Ling."

Under the osmanthus tree, upon hearing such polite words, Mu Ling'er raised an eyebrow and naturally pinched Xuan Yuan Wu Mu's cheeks with both hands.

Amidst Xuan Yuan Wu Mu's incoherent murmurs, Mu Ling'er pinched and pinched him repeatedly, finally giving him a gentle tap on the head.

"Little Wumu, I've told you so many times, just call me 'older sister.' 'Senior' makes me sound old. Do I look that old?"

Several years have passed, and Xuan Yuan Wu Mu's physique seems to have remained unchanged; he still looks like an eleven-year-old boy.

Because of his childlike appearance and physique, Mu Ling'er often liked to tease him like a child.

At the beginning, because of his dependent situation and the unequal social status, Xuan Yuan Wu Mu could only let Mu Ling Er "bully" him, and dared not be angry or speak out.

But as they gradually became more familiar with the situation, Xuan Yuan Wu Mu also developed his own opinions about this less-than-ideal matter.

This senior, who has a lot of questions, seems to be a bit dim-witted. More importantly, she is petite and has a baby face, so she is always treated like a child by the seniors, which probably bothers her a lot.

As for Xuan Yuan Wu Mu, he was definitely a perfect target for teasing this senior spirit.

Unfortunately, Xuan Yuan Wu Mu couldn't think of any reason to refuse Mu Ling'er, so he could only "reluctantly" let Mu Ling'er tease him.

That's right, he was unwilling! He definitely didn't actively try to get closer to her!

As for the benefits he received from Mu Ling'er over the years, Xuan Yuan Wu Mu said that he didn't want any of them at all; they were all forced upon him by Mu Ling'er.

He, Xuan Yuan Wu Mu, was a member of the royal family of the Taiyuan Empire, and he had no intention of currying favor with others whatsoever!

After having his cheek pinched again, Xuan Yuan Wu Mu rubbed his flushed cheeks and said seriously.

"Sister Ling, although the scale of primordial energy is larger, the concentration is higher, and it is widely distributed in every corner of the world, it still has many problems compared to spiritual energy."

Its purity is much lower and it is more volatile, making it unsuitable for high-precision applications. Trying to use primordial energy to replace spiritual energy to set up an array would probably not be an easy task.

The entire formation system will likely require major modifications. As for creating puppets using spirit ore, frankly, the difficulty is far beyond what the two of us can accomplish.

The well-reasoned deduction made Mu Ling'er nod repeatedly, and this scene also made Xuan Yuan Wu Mu secretly happy, so he took the opportunity to speak out his little thoughts.

"Of course, if the senior is willing to help with the research, we will definitely make breakthrough progress. Whether it's formations, puppets, or anything else, with the senior's supernatural powers, it will be a piece of cake. Why don't you go and talk to the senior, Ling-jie? That way, our research will definitely be much faster."

In Xuan Yuan Wu Mu's opinion, his suggestion was reasonable, and according to his observation, as long as Mu Ling'er spoke up, Mu An would definitely not refuse. In this way, he could also take this opportunity to ask Mu An some other questions.

Having lived in the Nine Realms for several years and by Mu An's side for just as long, Xuan Yuan Wu Mu still dared not have much interaction with Mu An, and only dared to achieve his goals indirectly through Mu Ling'er.

For Xuan Yuan Wu Mu, as long as Mu Ling'er was present, it would be much easier to ask Mu An questions, and he wouldn't be so nervous that he couldn't speak because of a single glance.

To Xuan Yuan Wu Mu's surprise, Mu Ling'er did not run directly to Mu An's side as usual, but sat under the tree and stared blankly for a while.