Mission in another world with my transformed best friend

When Zhang Lan first saw Wang Kai's rod-like weapon, she thought it was just an ordinary iron bar. But after hearing this, her attention was drawn to this naturally formed "steel," and she reached out to take it and examine it closely...

Wang Kai looked smug and was about to embellish the story with details about the origin and attributes of this "divine artifact" when Zhang Lan seemed to have discovered a key point and spoke first.

"This kind of steel, produced under natural high temperature and pressure, is harder than my 'invention'... no, 'imitation' steel, but it doesn't reach the 'legendary' strength you mentioned."

"You wouldn't understand, would you? Since we're on the topic, let me just give you a brief overview... describing the thrilling battle I had with some unknown master after acquiring this divine weapon..."

Wang Kai then spoke smugly and vividly for several minutes, but the main points boiled down to two: 1. He was swindled by a black market merchant but gained a "divine weapon" in return; 2. He used the "divine weapon" to "sever" a rare weapon from a two-handed swordsman...

Zhang Lan also sensed something unusual from these descriptions and immediately asked a key question.

"You said the other side has a two-handed sword, with a blade width of less than ten centimeters and a length of one meter and two or three inches. If we estimate its weight according to the standards of iron products, how much would it weigh?"

"Um, it must weigh at least ten kilograms, I'm just guessing..."

Zhang Lan weighed the "iron rod" in her hand, tossed it back to Wang Kai, and said...

"This 'steel bar' only weighs one or two kilograms. Putting aside hardness, given that the material is also 'iron,' quality is king. The opponent can wield such a heavy two-handed sword. Even if the sword is just held in a stance and you try to hit it, it's impossible for it to be 'bricked' in half with a single blow, unless there are long cracks on the blade."

Wang Kai became even more smug. He turned his head and looked around, his eyes landing on some decorative armor sets displayed not far away.

So he went up and pulled an iron sword from his armor set, then tapped the iron sword a few times with an iron rod. Apart from a few metallic clanging sounds, the iron sword was not damaged at all...

Zhang Lan also looked over with an expression of "I expected this," as if to say, "Look at your smug face. Playing hard to get won't work. Show me something real!"

Wang Kai no longer intended to hold back his trump card. He took a deep breath, and an extremely strong current of energy began to swirl around him, quickly merging into his body. After a few flashes of fluorescent green light appeared on the iron rod in his hand, he swung the iron rod at the iron sword with the same force once again.

After the first impact, a "humming" sound came from the iron sword, followed by a second impact. With a crisp metallic snapping sound, the iron sword instantly broke in two...

Zhang Lan had guessed that this might be how it would unfold, but she was still somewhat shocked. She walked over and picked up the broken piece of the iron sword from the ground. She examined the broken area carefully. The break was clean, and there were no other cracks around it. It didn't seem like it was "broken" by brute force. The only remaining possibility was "magic".

"I didn't realize that besides grinding monsters and leveling up, you also know how to use magic to create destructive effects that are unlikely to occur in real-world physics. Can you tell me how you do it?"

"Give Kyle a kiss on the cheek, and maybe I'll consider it..."

"If I were to give that thick-skinned guy a good punch, I definitely wouldn't hesitate... If you're not going to talk about it, oh right, I seem to remember something that would make you obey orders unconditionally, let me think..."

"Hehe (sweat), I was just kidding... Just say it, and if you don't understand, I'll say it again..."

"I'm all ears!"

Wang Kai thought for a moment: "When they almost gave me a 'one-ear' haircut earlier, they must have secretly used the 'review magic ring' on me."

Upon hearing this, Zhang Lan immediately denied it three times: "I didn't, I don't know, it wasn't me... *sigh*"

"You called it a 'control item'? I've told you about my 'Divine Favor,' right? I also used this bug to farm a lot of attribute points, which I got by using a full 24 'resignation' opportunities. This resulted in my class being 'Newbie.' So, in terms of class, I've reached the top. But you probably don't have a concept of how strong my character attributes are. Based on my understanding of this game, putting aside the comparison of the strength of class skills and magic, just in terms of individual combat power, I should be able to handle even NPCs over level 90..."

"Wow, level 65 is already that awesome, what will you be like when you reach level 90 or higher...?"

"Hmph, you just denied it three times, saying you'd never used the 'Review Ring,' but you let it slip. I'll settle this with you later..."

"Don't overpraise him. Although his attributes are already very strong, I really can't say whether he can defeat a 'Hero' level character. Apart from the Demon King himself who died, perhaps not many people know the true strength of a Hero."

"What are the heroes' levels, attributes, skills, number of ultimate moves, aura magic, and hidden techniques that ignore enemy defense and deal true damage, etc..."

"Faced with everything being unknown, I don't expect to find a way to surpass the hero through the information that is so hard to obtain. Instead, I'd rather develop a 'new skill branch' that combines magic and physics..."

Zhang Lan touched his temple and replied with a frown.

"Slow down. Although I had a period of 'gaming time' in middle school, I haven't played games much in over ten years now. At most, I'll play casual games like 'match-3' in my spare time after work. Could you simplify this long string of gaming terms so I can understand it better..."

Wang Kai was somewhat amused and exasperated, believing he had already described it in the simplest terms.

It seems I need to use terms that a "civil engineering" major would immediately understand, so after a moment's thought, I continued.

"By the way, when building bridges and railways, we should also take into account the weather conditions around the bridge."

"Nonsense, even though it's a steel railway bridge, it'll still be vulnerable to strong winds..."

Halfway through his sentence, Zhang Lan, recalling Wang Kai's "broken sword" earlier, immediately found a point of entry. After thinking for a moment, he looked at Wang Kai's face with an incredulous expression and said, word by word.

"Can you create 'resonance'?"

Wang Kai nodded with great confidence!

Zhang Lan still didn't believe it, and stared intently at his face with a look of curiosity.

Faced with this expectant "beautiful girl's gaze," Wang Kai naturally gained a great sense of vanity and satisfaction on a certain spiritual level. He wanted to whet people's appetites but was afraid of being threatened in return, so he could only extend the iron rod in his hand and explain.

“In the early stages, the character ‘Kyle’ chose water elemental magic. After I inherited his ‘account’, only the option of ‘secondary elemental magic’ was left.”

"Therefore, I thought about it for a long time and couldn't make a decision."

"One day, an opportunity arose. While I was using a few wind slimes as an air conditioner to cool off, I realized a very important piece of information: even if low-level wind magic can't do much harm to you, you can still feel the wind moving around. It's like a slap coming at you; even if it doesn't hit your face, you can still feel a breeze brushing against your skin..."

"...Wait a minute, Zhang Lan, can I ask you in advance what's with that hand you're secretly raising? What are you trying to do? I may be thick-skinned, but I'm not your testing ground. I just got a cut on my head, do you want to leave a red handprint on it too?"

Zhang Lan withdrew her hand and stuck out her tongue.

"Excuse me, but you're so earnest in your explanation that I can't help but want to try it out... Please continue."

"So, I use low-level wind magic to 'enchant' my body or weapon, while simultaneously controlling the magic power and direction of each wind spell. At that moment, the weapon or body itself will vibrate due to the 'wind pressure difference,' which is what you call 'resonance.' Try it..."

Wang Kai activated his magic, and the iron rod in his hand trembled slightly with an amplitude almost invisible to the naked eye. Zhang Lan leaned closer to take a look and reached out her small hand to touch it...

"Hey, you'd better watch out if you can break even steel..."

Zhang Lan rolled her eyes at him, reached out and grabbed his hand. She did feel a vibration through his skin, but it was just a slight tingling sensation... She quickly discovered the blind spot and replied.

“You’re right, but to achieve a destructive effect through ‘resonance,’ you need ‘hard contact.’ Conversely, if the amplitude is not large, contact with a soft object, such as my palm, will at most have a ‘massage’ effect.”

Wang Kai paused for a moment, then thought about it and realized it made sense. As expected of someone who had studied related professional knowledge, he immediately got to the point. Since the word "amplitude" was mentioned, then slightly reduce the frequency and increase the magic output, and that way…

Before Zhang Lan could react, the "frequency" of the iron rod's vibration decreased, but the "amplitude" began to increase. At first, she tried to grip it tightly, but as the "amplitude" grew larger, it began to shake violently up and down in her hand. The "massage" turned into a "painful blow," and finally, with a scream, her small hand was instantly "sprung" away, and she was thrown backward...

Realizing the joke had gone too far, Wang Kai tossed aside the iron rod and quickly reached out to grab Zhang Lan. Luckily, Zhang Lan was only slightly startled, her body leaning back a little. But as soon as she regained her balance, a hand still imbued with wind magic couldn't stop in time and pressed straight against her…