Bai Ling and Bai Di silently looked at the sad old professor, and neither of them asked why. Because they knew that even if they asked, the old professor would not say.

The old professor was silent for a while, and then said to them, "All right. As your teacher, I ask that when you have cultivated the five basic elements about the same. You have to be ready to receive my special training. ”

The brother and sister nodded earnestly at the same time. The old professor smiled slightly, and then said, "But today, I want to give you some small guidance first. Bai Ling, give me the seed of the sacred tree. ”

Bai Ling took out the white, somewhat transparent seed from his pocket and handed it to the old professor. This seed was now half the size of her fist, and Bai Ling could feel that there was some channeling between it and herself.

The old professor picked up the small seed and chanted a mantra softly, and the roots of the entire sacred tree began to glow with white light. The seed spontaneously floated out of the old professor's hand and flew near a thick root.

Under the gaze of the brother and sister, the seed was surrounded by a circle of whirlpools, and the energy in the roots was actually pulled into by these whirlpools little by little, and fed back to the seed itself.

"It's really a picky little seed, only willing to absorb the filtered energy, and it is estimated that he is also a disobedient master after turning into a spirit. The old professor couldn't help but laugh.

"Transform into a spirit?" Bai Ling asked in surprise.

"Even the elements can be transformed into spirits, but it is a descendant of the elemental god tree, why can't it be transformed into spirits?" the old professor asked rhetorically, "It will also thank you for not planting it in this barren soil casually." ”

The brother and sister watched in amazement as the seed moved around the space, each time it absorbed, its own white light became more intense and expanded, and the absorbed roots shrank significantly. In this way, the seed has absorbed the roots of more than twenty sacred trees, and it has become the size of a watermelon.

The old professor said, "Well, it will take a little time to transform into a spirit. Take advantage of this time, Bai Di, let me guide your cultivation. ”

Bai Di nodded, looking very expectant.

"Your fire elemental talent has the ability to heat temperatures. Although, almost all fire elementals have the ability to heat up, but it seems to me that you are special, why? Perhaps you yourself can feel that in the depths of your little body, there is still a part of power that has not yet been liberated. Maybe this power is not born to you, but with the help of the power of the Elemental God Tree, it will always be by your side, occasionally appearing, and even bring a sense of oppression to your opponent. ”

Bai Di listened, nodded heavily, and said, "Thank you teacher for your inspiration, I will work hard to cultivate." ”

The old professor smiled with satisfaction and said, "You are also very smart, you just lack the opportunity of Bai Ling. But I think that your stability can bring a sense of security to the people around you. ”

Bai Di smiled and said, "Protecting the people I love and those who love me is the greatest wish of my life. ”

The old professor smiled and nodded, and gently touched Bai Di's head. Bai Ling, who was standing on the side, had slightly red eyes, but did not speak.

The three of them were silent in the room for a long time. At this moment, a crisp cracking sound came from the watermelon-sized seed. Immediately afterward, a cracking sound rang out throughout the seed. A small emerald green dryad sat in the empty shell and stretched hard before crawling out of it. Its small, green eyes looked around, and finally stopped at the three people in front of it. It floated up slowly, circled around the three of them, and finally, finally came to Bai Ling's shoulder and sat down.

Bai Ling gently touched it with her hand, it had a real touch, and it didn't mind, and even stabbed her finger with a small branch.

"All spiritual beings are like human babies when they are first incarnated, they cannot speak, and they instinctively like others. It is most familiar with your breath, and probably treats you as a relative. The old professor said, poking the little tree spirit with his finger as well. Unexpectedly, the little tree spirit snorted unhappily, slid down Bai Ling's arm and landed in her palm, turning into a small seed again.

Looking at this seed again, it is about the same size as the seed in its original form, and it is a little more transparent than before.

Bai Ling thanked: "Thank you for your help. If it's just my own energy, I don't know how long I'll have to wait. ”

The old professor smiled slightly and said, "I have said that you have worshiped me as a teacher, so I naturally want to be sincere to you." What's more, these roots are so large that they were originally meant to deliver nutrients to the trunk, but the trunk is long gone. It's better to do something good for the little dryad. Even if it's not for you, they're all the lives included in my vow. ”

Bai Ling and Bai Di glanced at each other. Referring to that vow again, their mindset seems to have changed somewhat. First of all, they can already be sure that it is true. Secondly, the old professor treats them sincerely, so that they are willing to believe the old professor and even help him fulfill his oath.

The old professor suddenly said again: "Bai Ling, you don't have a wand yet, do you?"

"Yes, teacher. Bai Ling replied.

"Then I'll give you this wand. The old professor smiled slightly, and pulled out a white wand from the gray robe, "This is made of the roots of the Elemental God Tree. You've already got the Elemental Tree, and I think there should be no problem with using the wand it made. ”

Bai Di watched enviously as Bai Ling took the white wand, faintly emitting colored light.

The brother and sister left the old professor's house together and walked down the top floor. Before the sun rises, the sky is just dawning, and there is a wonderful feeling of vastness.

"Ling'er, have you come up with a name for the little tree spirit?" Bai Di asked.

"It says it's called a prodigal, which means wandering. It was the name given to it by the Elemental Tree. Bai Ling replied.

"Lang'er?" Bai Di repeated in surprise, "What a strange name." Stray children?"

Bai Ling shook his head and said, "It's just a name, since it wants this name itself, then even if it has a thought for its mother." ”

Bai Di nodded and walked back to the dormitory with Bai Ling. Bai Ling said goodbye to his brother in the mixed area of the dormitory and returned to the dormitory. The two partners were still asleep, and neither of them was cultivating. Bai Ling gently closed the door, lay on the bed and quickly fell asleep.

But after a while, Lang'er gently crawled out of Bai Lingdi's pocket, and a burst of green light flashed on his body. quietly circled around their dormitory a few times, and then returned to Bai Ling's side, leaning on Bai Ling's side, Lang'er naughtily rubbed his head against the pillow, and lay down comfortably, and then fell asleep......