"Metal... has the strongest shaping ability, stable properties, and is strong enough. The largest yields of metals..."

"...No, these metals are quite compatible with the power of the Holy Light with attack and defense nature, but they are completely healing."

"What about wood material? If it is because of the material aspect, wood should be closer to the concept of healing, right?"

"Not even... The power of holy light is not the power of nature, and its compatibility with various woods is not very good..."

"The cortex... is not good either. It only responds to the defensive power of holy light, and it is not universal."

"Bone... is not good either, even if it is OK... it's not the power of shadow!"

"What about minerals? Excluding metal minerals, you can only look at various gems... No, the output of gems is too low, the price is too expensive, and it is not universal, but the compatibility of healing power is unexpectedly good."

"Try something else..."

For more than a month, Wright spent most of his time testing the collected materials in the laboratory specially arranged by Karp.

The result is not very optimistic. The properties of materials with large output may not be consistent, and those that meet may not be compatible with the power of healing light. The gems with the best compatibility may be rare and expensive.

"Glass... This thing is very similar to a gem. Please test it..."

"It is compatible, but the glass is too fragile and the efficiency of light casting is too low - it requires a denser material to accommodate more holy light."

“How about artificial gems?”

Wright thought of the previous artificial diamonds, artificial crystals, artificial agate, etc., and asked Cap about the situation of artificial gems.

"Boy Wright," soon Cappu came to Wright with a list - this was already a major military secret. Cappu personally asked: "The largest production of artificial gems is white crystal - this is a sample."

"The white crystal is very large in production and the materials are very cheap. It was first used to make fake jewelry - because this was a group of fake jewellers arrested." Cap rolled his eyes and said, "Now it is more used to make glasses and special glass - this thing has high hardness and good light transmission. The glass in the fortress of the G3 branch is made of this thing."

"Everything is almost perfectly meeting the requirements..." Wright took the white crystal sample. This was a box of diamond crystals about the size of a thumb, with very high light transmission and uniformity - this piece is a standard unit of white crystal crystal, which is about twice as heavy as glass of the same volume, and the cost is only a few dozen Baileys.

"Light casting-healing!"

Wright held the white crystal in his hand and injected the healing holy light into the white crystal with the idea of ​​"healing fatal wounds".

Soon, about one-fifth of the Holy Light power of the Holy Light Technique was injected, and Wright felt that the white crystal had reached saturation. He opened his hand and the originally colorless and transparent white crystal had changed a lot.

The white crystal crystal has turned into a faint golden color, and there is a golden halo flowing slowly inside - more intoxicating than the best amber.

"It's done?" Cap looked at the beautiful crystal, and even with his determination, he couldn't help but feel excited - he knew very well what this would mean.

"The compatibility is good, about one-fifth of the Holy Light Technique... It should be more than enough to hold a fatal injury." Wright said happily: "Now, the last step is to find someone... No, just live things, test it!"

"Well, this guy is good, you can do more, I'll find some living things." Cappu turned around excitedly and left: "I'll go to the training ground for testing later. I ordered the training ground to be closed, and it won't be able to be used here!"

"Hey, don't worry! I'll study it again and test it tomorrow morning!"

"Okay, I will try to prepare as much as possible and I will give you some white crystals later!"

Cape left in a hurry, and Wright began to study how to improve the efficiency of photocasting - filling one by one is too wasteful of time.

...

The next morning, Cap could not wait to run over to smash Wright's door: "Boy Wright! The things are ready, and the results are quickly tested. I can't wait for a night!"

"..." The smelly old man really doesn't know how to care for researchers - I am a treasure now!

When the impatient Karp came to the closed training ground, he could hear all kinds of strange screams in the training ground.

"...Old man Kap, how many living things have you prepared?"

"Not many, just dozens - those who have not been injured yet, they will be beaten according to the situation during the test! If you die... Well, whether you die or not, you will be sent to the cafeteria for extra meals!"

“…”

In order not to let your cute subordinates suffer, you can only sacrifice your little cuties!

From rabbits, cats and dogs, to wolfs, bears and even elephants... God knows how Captain got so many "little cute" in one day!

However, this also ensures the accuracy of the test.

After a morning of testing, Karp personally tested the healing effect of crystals in various states such as minor injuries, serious injuries, dying, broken limbs, blood loss, coma, etc. - the results were very gratifying. After several minor adjustments, Wright finally determined the final state and inspiration methods of crystals.

So, now Karp hid in the office and called the Warring States to show off: "Ah hahaha, Warring States! You don't know what kind of feats did Boy Wright do!"

Bar, Bar, Bar, Bar,... I can't tell that old man Cap is so eloquent. He clearly described the causes and consequences of the birth of the healing crystal that officially named Wright "Light-cast Crystal" - just the mixed period "Guess...", "Ah haha, the stupid Warring States Period...", "Of course I personally..." and so on are quite harsh.

“…”

After hearing the effect of Kap's light casting crystal, the general of the Warring States Period was extremely serious, and his eyes flashed: "This matter is listed as the highest secret. You take Wright back to the headquarters and report your duties directly to me, immediately, immediately!"

This is a strategic resource that is enough to reverse the increasingly unfavorable situation of the Navy against Pirates!

...

Navy headquarters, Marinfando.

After reporting to the Warring States Period, Cap immediately rushed to the headquarters with Wright and the light cast crystal samples and reported directly to the Warring States Period.

In fact, when Kap and Wright arrived at the headquarters, the Warring States Period had already greeted him in person at the port: "No further ado, go to Brother Kong with me, and Ahe is here too!"

The group rushed to the marshal's office. The marshal Cyborg, Kaoru and the Grand Staff He had already taken their seats, staring at Wright who was following the Warring States Period and Cap.

Everyone sat down, and Wright did not delay: "Report to Marshal Kong, General of the Warring States Period, Lieutenant General He, I have brought the things, please see."

A golden light cast crystal was placed on the conference table by Wright, and its beautiful brilliance made it more like a work of art.

"Ltd. Gen. Karp has helped me test the effect of light cast crystals on different animals. Because my ability is the same for animals and humans, so although human experiments have not been conducted yet, I have reason to think light cast crystals are equally effective for humans."
Chapter completed!