After Duke finished the Magic Basic Theory class, he had a basic approach and direction for learning magic.

A day's course couldn't cover much content, but it allowed Duke to grasp the contents of the Magic Basic Theory more quickly.

Once he thoroughly understood this set of content, self-learning other magic would be much easier, at least with a basic methodology and theoretical foundation.

After Duke mastered the Wizard's Mark, the first person he wanted to contact was naturally Vivian.

However, if you want to record another wizard's mark, it must be exchanged face-to-face, which is a bit troublesome.

Duke thought about it and decided to write a letter to the Thorn Holy Tower to inform Vivian of this matter.

There is a place on Academy Island to send and receive letters; they don't deliver letters, so you need to inquire if there is any for you.

After returning to the dormitory, Duke took out a quill pen and wrote a letter, talking about some recent situations, overall quite brief.

When he arrived at the island's mail reception, he spent a few silver coins to send the letter out, and casually asked if there was any mail for him, and to his surprise, there was.

The letter was from Vivian and had arrived a few days ago.

After verifying his identity with his Black Sail Badge, Duke took away the letter from the Thorn Holy Tower.

When he opened it back in his room, he found besides the letter, there was also a small black cube, purpose unknown.

Vivian had written this letter a few days earlier, still recounting some things after joining the Thorn Holy Tower.

After joining the Thorn Holy Tower, she directly became Grace's student.

Vivian only learned after reaching the Thorn Holy Tower that Grace is a Level 3 great wizard, extremely powerful, and holds a high position.

As Grace's student, she naturally didn't have to worry about resource issues.

But the pressure was immense as Grace arranged extremely tight courses for her, with a long list of courses waiting for her to learn.

Vivian recently was under high-intensity study, learning from early morning to late at night, the intensity extremely high.

In the letter, Vivian mentioned that she had learned the Wizard's Mark spell and left her Marking Engraving.

The Marking Engraving is a type of alchemy creation, used to store a Wizard's Mark.

It was developed to facilitate the exchange of Wizard's Marks among wizards; despite its small size, it isn't cheap.

The market price for one Marking Engraving is over twenty Level 2 magic stones.

If not for Vivian mentioning it in the letter, Duke wouldn't have known such a thing existed.

He then followed the instructions in the letter, using his Spiritual Power to activate the Marking Engraving, and subsequently, a mark was imported into his own Wizard's Mark.

In Duke's Wizard's Mark, there appeared an additional mark, which was Vivian's.

He tried sending a message over and received a response shortly after.

"Duke?" Vivian sensed a familiar aura from the Spiritual Power fluctuation within the message, "I thought the letter hadn't been delivered, I've been waiting for days with no news."

"They don't deliver letters on this side, I didn't expect you to write to me so early," Duke said.

Vivian was holding a thick book walking down the road, heading to the classroom for a lesson, and replied, "I have a class soon, if the teacher finds out I'm distracted chatting with a Wizard's Mark, I'm done for. Let's talk tonight instead, be careful over there, I've been learning some things about Black Sail these days."

"Among the Wizard Apprentices over there, violence often occurs, the management isn't as strict as Thorn Holy Tower, be extra careful!"

Duke replied, "Mm-hmm, I understand."

These past days he had already felt it, Academy Island appeared calm on the surface, but was actually somewhat chaotic and disorderly.

Unless absolutely necessary, Duke wouldn't even step out to avoid unnecessary trouble.

...

Five days later.

[Deep Blue Tide Meditation Technique level up, Spiritual Power +0.5]

[Deep Blue Tide Meditation Technique: LV2 (1/1500)]

[Spirit: 12.8]

Over this period of Meditation Practice, Duke finally grinded the Meditation Technique up to LV2, with the Skill Tree granting 0.5 Spiritual Power.

Originally, the Spiritual Power was 12.1, and during this period of Meditation Practice, it had auto-increased by 0.1 point.

Additionally, there was 0.1 Spiritual Power from leveling up the Wizard's Mark spell.

Ever since adding Vivian's Wizard's Mark, they would often chat at night, unknowingly boosting the proficiency.

Duke sensed the difficulty of wizard practice; after more than half a month of Meditation Practice, his Spiritual Power had only increased by 0.1.

If not for the Skill Tree, achieving 15 points of Spiritual Power through meditation would probably take forever.

Moreover, like other attributes, the higher the level, the harder it is to improve Spiritual Power.

If one's aptitude is insufficient, Spiritual Power might become stagnant before reaching 15 points and be unable to improve further.

Duke glanced at the Skill Tree, and the Meditation Technique's branch was still in a green bud state; it's unknown how many levels it takes to grow leaves.

For the subsequent half month, Duke was engrossed in devouring that Magic Basic Theory book, absorbing knowledge, and gradually laying the foundation for his knowledge system.

Every day, apart from reading and meditating, he would chat with Vivian at night to brush up the Wizard's Mark proficiency.

Half a month later, Duke felt his grasp on the theory of basic magic was roughly solid and planned to start practicing, selecting one or two spells to learn.

He had discussed this matter with Vivian, who often shared her insights with him.

Duke had mentioned that he absorbed Water Elemental Energy Particles very easily but hadn't mentioned anything regarding his talent, only lightly touched on this aspect.

Upon learning this, Vivian quickly looked into it and even consulted teacher Grace.

The final conclusion was that Duke should study the "Basic Theory of Water Element" book.

Though this book has "basic" in its title, its content is profoundly deep.

The Basic Theory of Water Element systematically explained the various applications of water elements in magic, covering a variety of water magic, with extremely rich content.

If Duke could master the content of this book, he could even develop some water spells himself, designing water spells according to his needs.

However, achieving this level in a short time might be difficult; in the early stages, being able to flexibly use some magic would already be good.

The book's price is very high, requiring a full three Level 1 Magic Stones, which is over three hundred Level 2 magic stones.

Hearing this price made Duke dizzy; even selling himself might not fetch that much money.

Even buying a second-hand one requires at least over a hundred Level 2 magic stones, and he simply didn't have that much money.

But Vivian solved this problem for him, sending over a second-hand "Basic Theory of Water Element" which was on the way.

She didn't even tell Duke about this, only mentioning it after sending it out.

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