Fortunately, this kind of asset-heavy investment does not need to be made once a year, but it can be invested once for life, and can even be passed on to future generations, with little depreciation.

Similar to the spell book is the Mage Tower, but the Mage Tower is more "heavy".

Even Xia Duo has not considered building his own mage tower at this stage, it is too expensive, even with Niya's help, it is difficult to afford the down payment of the mage tower.

Just from the fact that a single overhaul of the Tower of Time costs nearly a million gold coins, you can know how much it costs to build a mage tower.

Of course, the Tower of Time is a bit special, not counting the Plane Exploration Array, and just having multiple sets of equivalent backup arrays of different ring levels will make it more than ten times more expensive to build than the normal version.

If the ordinary mage tower is used, millions of gold coins can be built, and this Qian Niya should be able to make up this kind of hard work, but Xia Duo is not willing to make such excessive requests.

In fact, no matter how close Niya is to his relationship, he must also consider the sustainable development of the Tower of Time itself, if he really wants to make up money for Xia Duo at all costs, then Xia Duo really doesn't dare to ask for it.

Such an irrational person, God knows what unexpected operations will be made in the future, and if it turns black one day, Xia Duo does not doubt it at all.

Fortunately, although Niya is occasionally a little childish, she is not sickly, she is still a normal woman with normal thinking, normal reason, and normal emotions, well, she is still very beautiful.

Otherwise, Xia Duo would have been thinking about running away.

……

Putting away the spell book, Xia Duo followed his body's instinct to summon a clean water ball, and as soon as the water ball appeared, he trembled and leaned towards Xia Duo, rolling back and forth on him.

After a while, Xia Duo's whole person was refreshed and energetic, and he swept away the sloppiness of "retreat" for many days, and then he called Taling to cancel the state of "no disturbance".

"Xia Duo, you're finally out!"

As soon as Xia Duo's authority status in the Tower of Time was restored, Nia came directly to the door and looked at Xia Duo quite nervously: "Is the spell book completed?" Is there something missing? ”

"No, I'm done."

Xia Duo comforted Nia and sat down first, and then asked, "How many days have passed?" Did Lord Rodney send an invitation? ”

As long as there is no special operation on the sixth floor of the Tower of Time, it is all constant temperature and constant brightness, and during the "retreat", as long as Xia Duo feels a little tired, he will have a [deep sleep] on himself.

At first, when he woke up, he would ask Taling about the current time and date, but then he didn't bother to ask, he wouldn't go out anyway, so he lost the concept of time.

Out of respect for Shado, and the habit of high-level mages avoiding inquiry, Nia did not know the specific behavior of Shado during this time.

When listening to Xia Duo's inquiry, Nia felt a little strange, she looked at Xia Duo carefully, and did not find anything in Xia Duo that was in such a bad state that she ignored the appearance of time, but she still replied seriously:

"It's been four days since Archmage Greta left, and as for Lord Rodney's invitation, he hasn't been sent yet."

As she was talking, Niya suddenly seemed to be a little embarrassed, and quickly took her eyes off Xia Duo, lowered her head and explained softly: "I contacted the teacher, but the teacher didn't reply. ”

Xia Duo was stunned for a moment, and then he realized what Nia meant, and couldn't help but be a little moved, "Don't bother Her Royal Highness the princess anymore, I believe that since Archmage Greta said that there is no danger, there will definitely be no danger, and besides, I will be fully prepared myself, you don't have to worry." ”

Nia snorted, not speaking, but not leaving, just looking at the ground not far away, not knowing what to think.

Ahem –

"Nia!"

Xia Duo shouted softly, and when Nia looked over, he said with some scorn, "Do you know any silver or light gray dyes that don't fade easily?" ”

"Ahh

A light cry of surprise came from Nia's mouth, she obviously didn't expect Xia Duo to ask such a question, so she wanted to confirm again:

"Shado, you, are you looking for dye?"

"Yes!"

Xia Duo took out the spell book he had made before from his personal space, and did not hand it to Nia, but just shook it in his hand, which was obviously the dark blue of the primary color of pure gold at this moment, which was more dazzling than before:

"This is my spell book, but I don't like the color very much, and I want to change it to a more low-key one."

Xia Duo didn't know much about the dyes of this world, of course, including the dyes on the earth, and turned to Niya for help at this time, and he just caught one person and asked.

Looking at Xia Duo's dark blue spell book with an obvious metallic luster, Nia's expression was quite strange, "You use pure gold as a packaging material?" Do you still want to use it to smash people? ”

However, she didn't want to interfere too much with such a personal item as the spell book, but seriously remembered which dye could last long on the surface of the adamantite gold.

After a moment of thought, Nia gradually frowned, as she could not remember any silver or light gray dye that could last long on the surface of the adamantite gold.

"I'm sorry Shado, I can't think of any dye that lasts long on the surface of Adamantite, I'll ask the others, but I don't think there's much hope of finding it."

Hearing this answer, even if he had been mentally prepared before, Xia Duo was still a little disappointed, but the color of the equipment is secondary after all, as long as the function is normal.

Just as Shador was about to give up painting the spell book, a flash of inspiration flashed through his mind, and he thought of a person—the dwarf Blotto, who had slain dragons with him not long ago.

You may not find a dye that can color a metal surface, but that doesn't mean there's no way to change the color of a metal surface.

The so-called painting is not simply adhesion dyeing, but also directly changes the color of the metal itself, such as the coating on the earth through chemical reactions.

Although there are no electromagnetically active chemical reactions on Earth in this magical world, similar elemental reactions are common.

For example, the transmutation of Mithril is that different elements and energies are constantly circulating, hedging, and converting in the Mithril component, causing a small amount of Mithril to become other substances, thereby reducing the purity of Mithril and thus affecting the energy operation in the Mithril component.

As the master blacksmith of the wizarding world, the dwarf Blotto should be quite aware of the various reactions to these metals, and perhaps he has a way to coat the surface of the adamantite gold with a discolored film that can hide its dark blue color.

Maybe you can choose a color, or even a custom pattern!

Thinking of this, Xia Duo couldn't help but have some expectations, of course, there was no need to give up on Nia's side, if he could find a more convenient dye, then he would still choose to use the dye.

After all, in many cases, convenience is enough to override everything.

Even, if he can't find any way to change the color, he won't be unable to accept the current spell book, but if there are conditions, it is more pleasing to the eye to change the color or change the color.

……