Opened a martial arts school, and his eldest disciple Batman

Chapter 64 The Murdered Graysons
At the central control platform of the Batcave, Banner sat aside, using his newly bought notebook to organize the downloaded learning materials one by one, making them into courseware and arranging subsequent learning plans for the children.

Alfred brought a tray with a plate of cookies and a cup of warm black tea.

"Thank you." Banner thanked out of habit. After taking a sip of black tea, he immediately opened his eyes wide and looked down at the teacup.

"Wow, this is the first time I've had such... mellow black tea. I think it tastes great even without sugar."

Banner's appreciation of aroma has reached the level where he thinks it tastes good even without adding sugar.

Alfred smiled slightly and was about to introduce the source of this expensive black tea when a car rushed through the waterfall entrance of the bat cave and drove under the platform.

Du Mu and Batman came back, and with them came a man wearing strange armor with irregular and twisted hands and feet.

Obviously all his limbs were broken, but his face remained calm. He didn't scream or struggle in pain. He was roughly tied up by Batman in a standing freezer.

Seeing this man, Banner was the first to express surprise: "Huh? Night Owl?"

Batman immediately turned his head to look at Banner, frowned and said: "Night Owl? You know him? But he used to call himself Claw."

Night Owl is also a nickname for owls, but from Banner's tone, it is obvious that he is not simply admiring the elements of his armor, but has really seen something similar.

Banner was confused and said, "Uh... they seem a little different? When I was a kid, I read a comic called "Jester and Luther". In it, a villain organization called the Crime Syndicate had a leader who was dressed like this. No, actually, they are not very similar, but they both have the element of an owl."

comics?

Upon hearing that it was a comic, Batman immediately lost interest and continued to draw blood from the man for testing.

Du Mu looked at Banner, somewhat surprised.

He didn't know that the Marvel and DC worlds have each other's comics, and this has never been mentioned in movies, animations, and other film and television works.

But Du Mu still knew the names "Criminal Syndicate" and "Night Owl", after all, there was an animation about them, which seemed to be called "Justice League: Crisis on Two Earths".

Moreover, Nite Owl is Batman's alternate universe counterpart, so it seems that... maybe in Gotham City on Earth-3, Nite Owl became the leader of the Court of Owls, which is why there is such a similarity in style.

"However, because the villain was so popular, the magazine later simply abandoned the protagonist and launched a monthly magazine that mainly describes the villain. As a result, the company was burned down by angry parents, and they went bankrupt and ceased publication." Banner said helplessly.

He actually quite likes that comic.

Batman placed the blood in the analysis instrument, and then took out a violently disassembled metal pipe from the storage box of the Batmobile.

He used a bat dart to scrape off a layer of iron filings on the water pipe, placed the powder on a transparent glass slide, and sent it into another analysis window.

What followed was complicated operations on the computer. Du Mu had no relevant basic knowledge and looked confused.

Banner, however, looked at the data and analysis on the screen and said in surprise: "Huh? Liquid metal material that does not cause human body rejection? The density is almost the same as that of water molecules. No wonder it can be absorbed into the blood. Is it really okay to use this thing as a water pipe? It must have an impact on health. Is this a victim?"

As he spoke, he suddenly became serious: "Wait... the wavelength is not right. Does this liquid metal have radiation?"

Batman turned to look at Banner: "Do you have any information about this?"

Banner pushed his glasses down and said shyly, "I have a doctorate in nuclear physics and radiation physics... Of course, it's from another world and may not be applicable to yours, so please don't mind if I make any mistakes."

He pointed to some data on the screen and said, "This radiation wavelength is very hidden, almost like a piece of encrypted information. It is difficult to detect it with ordinary detection equipment. However, you can use Fourier series analysis to regard them as a mixture of multiple sine waves. You should be able to summarize the rules quickly."

Batman remained silent, but his hands tapped the keyboard much faster.

Banner stroked his chin and frowned, "But what's incredible is that it has a structure similar to mercury, but it is difficult to evaporate and always remains in liquid form. Fortunately, otherwise it would spread into the air and directly pollute the entire city."

"Okay, I have located the wavelength of this radiation, and the relevant detection equipment will be made tonight."

Batman breathed a sigh of relief and looked at Banner: "Thank you, Dr. Banner."

"This liquid metal is indeed very dangerous. The radiation it emits can affect a person's mind, but once it enters the bloodstream, it can give the person who receives it a certain degree of self-healing ability."

Banner's face darkened when he heard this: "So he became... a monster that can heal itself?"

As he spoke, he looked at the claw that was bound in the freezer. At this time, the other party had slowly closed his eyes and fell into a deep sleep.

Batman nodded and said, "Yes, fortunately this metal is low temperature inert, which makes the injector fall into hibernation in a low temperature environment. The master behind him usually places him in this way."

Upon hearing this, Banner looked at Claw with a complicated expression.

At this moment, a faint voice suddenly came from Batman's earphones. Du Mu heard it clearly, it was a young man's anxious report.

"Batman! Do you remember the Graysons you rescued before? They were murdered! Dick is missing too!"

Batman's face suddenly darkened, and he turned and walked towards the Batmobile, lowered his head and pressed the earphone in the mask and said, "Tell me the coordinates, I'll rush over immediately."

Du Mu couldn't help but frown.

Dick Grayson should be the first Robin, who later set up his own studio and changed his name to Nightwing.

His parents were both acrobats. Dick became an orphan after an accident during a performance and was subsequently adopted by Bruce.

Apparently, in this world, the couple was saved by Bruce... only to be murdered afterwards.

Could it be the so-called world will? Destiny?
But in the world of Hogwarts where prophecies really exist, Voldemort was killed easily by himself. It doesn't seem like fate cannot be defied. Could it be a special reason in the DC world?
But since it was a murder, there must be a murderer. Perhaps the Graysons' performance accident was not an accident from the beginning, and there is no need to elevate it to the level of fate.

"Apprentice, do you still need my help?"

Du Mu asked softly.

Batman paused, turned around, was silent for a moment, and then said: "You have helped me a lot. This matter is a sin caused by Gotham itself. I don't want to trouble you."

Then he jumped into the Batmobile and said to Alfred, "Alfred, help me make a metal detector based on the existing data in the computer."

With that, the roof of the Batmobile slid forward, obscuring Batman's face, and the vehicle rumbled away, heading out of the waterfall.

The three of them watched the Batmobile depart, and Banner hesitated, "Uh... he seems really busy."

Banner couldn't hear the message from the other side and didn't know the seriousness of Batman's question this time.

Du Mu retracted his gaze and said, "Since he doesn't need my help, as a master, I naturally have to trust his choice."

After saying goodbye to Alfred, Du Mu and Banner got in the van together, dissolved the blood in his heart, and instantly returned to the martial arts gym along with the vehicle.

After using it for a period of time, Du Mu has summed up the rules for reverse penetration of the martial arts hall gate.

It can only open a portal to one world at a time; if people from two worlds pass through the gate, only the one with more people will be teleported; if the number of people is equal, only the one with higher weight will be teleported.

And if all people have blood that can lead to a certain world, the portal will choose to teleport them there together.

Therefore, the weight of quantity is greater than that of quality, and quality is considered only when the quantity is consistent.

So Du Mu didn't need to worry, people from other worlds could rely on blood to travel to different universes. Even if a single traverser directly transfused 200 ml of blood, he could only return to his own world, because the active substances in his body that belonged to his own world were heavier.

On the other hand, only the chosen ones, such as Harry, Bruce, Banner and others, can enter and exit the specific location freely. Others can walk back and forth in that location and will not come to the martial arts gym.

The only exception seemed to be Lei Xiaogu... Du Mu thought about it and felt that the main reason was that the other party was fighting with Bruce at the time. When they were in contact with each other, Bruce brought him into this world.

Banner, who returned to the martial arts gym, still felt a little dazed, so much so that after getting off the car, he looked at the gate of the martial arts gym and was reluctant to close the door.

It’s that simple... I can travel between several different universes?
No protective clothing, no special equipment, no need to provide additional energy.

Is magic really that amazing?

Even in Banner's mind, anything that can summarize rules is science...but compared with everything he learned in the first half of his life, magic is so different that it is hard to believe that they are knowledge that humans can master at the same time.

Seeing that Banner was in a daze, Du Mu ignored him and took out the children's toys, snacks, exercise books and pens from the trunk, then went to the backyard to distribute them to them.

It was not until Du Mu's figure completely disappeared in the front yard that Banner closed the car door, took off his glasses, rubbed his brows, and sighed, "But speaking of violating the laws of physics... Hulk is the same. I don't eat much, so where does he get the energy to become so big when he transforms."

at this time.

A warrior dressed as an owl suddenly appeared out of nowhere at the gate of the martial arts hall.

The long knife in his hand chopped down at Banner's head!

This chapter explains some settings, so I wrote 1000 more words.

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(End of this chapter)