Now that he had new spiritual energy, the next step was naturally to fuse with it.
He had already clearly experienced the effects of spiritual energy once; it not only allowed him to quickly master the physical abilities of others, but also seemed to subtly enhance some of his own physical abilities, such as strength and speed.
Although the feeling wasn't clear, and Xu Yu wasn't sure, he could confirm it by trying.
After issuing the intention to fuse, the spiritual energy was immediately mobilized, surging into his body. At the same time, that slight pain and tingling sensation returned.
This time, because he was fully focused on the changes during the fusion, Xu Yu clearly noticed that his strength and mental state were indeed slowly improving.
Although he couldn't determine the extent of this improvement, the clear feeling still greatly excited him.
After the fusion was complete, Xu Yu casually clenched his fist and found that his strength was significantly greater than before.
"It really did improve a bit." A subtle glint flashed in his eyes. Xu Yu suppressed his excitement, thought for a moment, and then reached into the remaining items to continue fusing.
After consuming another 1 unit of energy and refining a portion of spiritual energy, Xu Yu didn't hesitate and continued fusing, because he was extremely eager to understand the extent of those improvements.
Although he didn't know how to discern them, he felt that as long as he continued fusing and improving, he should be able to make a rough judgment once he reached a certain limit.
With a strange thought in mind, as that tingling and pain quietly returned, a new idea suddenly surged into Xu Yu's previously excited mind.
"Fused spiritual energy 3, increased energy by 1, possessing energy 4, current energy 2."
"Huh?" Upon hearing this idea, his expression immediately changed, and a look of shock suddenly appeared in his eyes. Increased energy by 1? His energy limit had actually increased so quickly?
Now, he clearly understood the role and significance of energy. Three units of energy represented everything a normal person possessed, including strength, endurance, and various physical abilities, as well as various mental states. Its significance was undeniable.
He hadn't expected that just three fusions of spiritual energy would increase his energy by one unit—a one-third increase in all aspects?
Thinking of this, Xu Yu was not only shocked, but also filled with a joyful realization.
With the increase in energy, the changes brought about by a single fusion immediately became clear.
It was probably a one-ninth increase in all aspects of a normal person's abilities!
"Three units of spiritual energy equal one unit of energy. Doesn't that mean that as long as I continue to fuse, I can gradually improve all my abilities? Then…"
In a state of excitement and anticipation, looking at his remaining two units of energy, Xu Yu began fusing again.
However, after a new unit of spiritual energy settled in his mind, Xu Yu's intention to continue fusing suddenly froze. After all, he stayed here to quickly understand the various functions of this ability.
Now that he understood the effects of integrating spiritual energy into himself, shouldn't he explore other aspects? He clearly remembered that his initial thought had told him that spiritual energy could integrate with almost anything.
Speaking of which, he was also curious: if spiritual energy could undergo such a terrifying transformation when integrated into oneself, what would happen if it were integrated into ordinary objects?
Thinking it over, Xu Yu quickly took a simple jade pendant from his neck. This was a gift he had intended to give to Zhang Yan years ago, but he hadn't had the courage to give it to her. Since then, this jade pendant, which cost several hundred yuan, had remained with him.
Gently holding the jade pendant in his hand, Xu Yu's thoughts were initially chaotic, but quickly returned to focus. The jade pendant before him was shaped like a beautiful woman's earlobe, its emerald green color pleasing at first glance. However, upon closer inspection, one could see that the green was unevenly distributed and contained tiny impurities. Xu Yu was helpless; with his abilities at the time, he simply couldn't afford to buy jade that was too pure and exquisite.
With another soft sigh, Xu Yu then issued the fusion command to himself.
The moment the command was issued, Xu Yu immediately saw the surge of spiritual energy in his mind vanish in a flash. Then, a strange warm current flowed through his right arm, lightning-fast, converging on the jade pendant in his right palm.
In a short moment, the jade pendant in his hand suddenly lit up, carrying a slight warmth.
But almost simultaneously, the thought in his mind abruptly surfaced.
"Fusing with a spiritual object requires 1 unit of stamina!"
As the thought arose, Xu Yu's originally abundant stamina immediately began to drain away, which startled him. He exclaimed in surprise, "How can fusing spiritual energy into something else not only consume spiritual energy but also stamina?" A spiritual object?
Regardless, the fusion had already begun, and he could only watch helplessly as his spiritual energy drained away. The scorching heat emanating from the jade pendant in his palm intensified.
This continued for about a minute before the faint light that had been enveloping the jade pendant suddenly dissipated. Then, the jade pendant gradually cooled down, becoming cool and smooth.
Xu Yu's body quickly became extremely fatigued.
After all, he only had 2 units of stamina left. Fusing with one unit of spiritual energy, plus the additional 1 unit of stamina, completely exhausted all of his stamina.
"Frustrating! Calculating it, fusing a portion of spiritual energy into something else, including the energy needed to create that energy, doesn't it consume 2 units of energy? That's twice as much as fusing it into oneself!"
As drowsiness intensified, a mere few seconds later, a trace of frustration surfaced in Xu Yu's mind before he completely fell asleep.
He slept for over ten hours before suddenly waking. The first thing he felt upon waking was that his energy had become extremely abundant again, reaching 4.
A cool, warm current constantly nourished his right hand, a sensation so wonderful it made his palm tingle, giving him a feeling of floating bliss.
Following that wonderful sensation, Xu Yu immediately looked down at the jade pendant in his hand. He wanted to see what the effect of fusing energy, which consumed twice the amount of energy, would be.