Wayne Mansion had already been completely occupied by the Assassins by this time. Masked Assassins dressed in Oriental armor roamed the building, all of its staff held hostage inside, and no one was allowed to go out or enter.

Nightwing and Red Robin jumped along the outer wall of the building, fastened to the roof with a rope, and climbed up the wall like rock climbs to some of the unclosed skylights in the stairwell. Of course, at the very least, they didn't forget to confirm that the "oracle" - that is, Barbara Gordon - had hacked all security surveillance along the way.

According to the surveillance monitor hacked by the oracle, Batman is being held on the sixty-third floor. The two of them quickly approached the sixty-third floor through the safety ladder, and the whole process was as silent as ghosts, and they were not discovered by a patrolling ninja, even the world's top spies and agents could not have done the best work than these two.

Or rather, they are the best agents in the world.

Coming to a corridor on the sixty-third floor, Barbara suddenly received new news.

"Wait a minute," she said in the communication channel, "the Winged Knight has just made a new discovery!" The purpose of the League of Assassins should be sonic weapons, they want to cover the whole city with sonic weapon covering, and spread lethal ultrasound waves to the ears of everyone in every household, which will tear the whole of Gotham to shreds! ”

"What!?" Nightwing pressed her headphones and asked in surprise, "I heard that thing doesn't only have the coverage of a large building?" ”

"Yes, indeed. However, Winged Knight just asked me to pull up the internal information of Wayne Enterprise, and found that this prototype is also equipped with a set of amplification equipment, which can expand its area of effect to the entire city! Barbara said.

Red Robin also realized the seriousness of the problem: "Wayne Mansion happens to be in the center of Gotham and it's been so long, I think whatever that amplification device is, the League of Assassins should have already succeeded." ”

Barbara said, "One of you needs to hurry up and find Lucius Fawkes, he's the guy in charge of the technical department, and he might have a way to stop this." ”

"Okay, I'll go, Nightwing continues to rescue Batman." Red Robin said as he turned around to turn around, but paused for a moment when he turned his head.

It was really like a ghost that appeared silently behind the two of them, and the ninja master Lei Xiaogu, wearing a green cloak and an earthy yellow coat, looked at the two of them expressionlessly and indifferently, just standing like a sculpture at the intersection they had just passed.

"Unfortunately, you can't go anywhere." He said.

Nightwing's expression became solemn, and he pressed the communicator and said, "Okay, oracle, it looks like we won't be going anywhere for a while. ”

At that moment, the blinding light of the searchlight suddenly filtered through the glass. A loud voice came through the loudspeaker from all sides of the building: "Listen to the people inside!" This is GCPD! Lay down your arms and surrender quickly"

It was Roy's idea to let Chief Gordon burst in with all the police force he could muster.

Although the police may not be very powerful, they can hold the attention of a large part of the ninjas of the Assassin League. This caused the internal defense of the building to decline to a certain extent, which facilitated his movement.

In other words, the policemen who were pulled over by him with such a huge momentum played the role of smokescreens in the final analysis.

Now, following Barbara's instructions, Roy jumps from the same skylight that Nightwing and Red Robin had just slipped into and landed onto the safety ladder.

"Now you're going to go to the conference room and find Lucius Fawkes, and he might know how to stop that sonic weapon." Barbara said, "I've uploaded his location to your mobile computer, along with a detailed plan of the Wayne Building." ”

After opening the holographic screen on his wrist and observing for a moment, Roy suddenly said, "Do you know how many shortcuts there are on the structural diagram that have not been marked?" ”

"What?"

Roy didn't answer directly, but went down the stairs to the hallway of the next floor, groped along the wall for a moment, and opened a secret door.

"Awesome!" Barbara exclaimed, "Looks like Bruce left a convenient passage for Batman in his own company." But how did you observe this? ”

"I'm not an immortal, how can I observe that there is nothing fresh in my field of vision?" Roy grumbled as he bent down into the passageway, "I know it's because I found out the last time I came to investigate the sonic weapon theft." ”

Lucius Fox and a group of directors sat at the conference table. When the ninjas broke down the door, they were holding their monthly wrap-up meeting. Several ninjas quickly entered to take control of the situation and forbade any member of the board from leaving the room.

The last time Roy had entered the bat tunnels in Wayne Enterprise, he had secretly made a few routes and exits. Now he crouched at the exit of a secret door on the wall of the conference room, observing the outside through the thermal imaging in his mask.

Sitting around the table, sitting on the chairs are undoubtedly hostages, and the three standing ninjas are the guards, and the direction of the three people's perspectives changes regularly, ensuring that the 360° all-round view is almost seamless in the surveillance of the three people.

But what Roy is best at is keen observation and speeding calculations, and it didn't take him long for him to summarize the law of the three people's perspective changes, and confirm the brief gap between their perspective changes - there is only a few tenths of a second of a chance, and the exit of the secret door where Roy is in the perspective of the three people is a dead end.

This was followed by a rapid calculation of possibilities.

Barbara helped him conclude when he trained him, his biggest advantage is his precise brain, and he can calculate the next few moves more accurately and quickly than ordinary people in fast-paced fights, and can accurately plan the connection of every move. In many cases, even if the real martial arts are not as good as the opponent, but through the calculation of various possibilities and the response plan, he can be able to anticipate the enemy first, so as to achieve the effect of defeating the opponent who is stronger than himself.

Like now.

The flurry of planning in his brain was quickly completed, and after waiting for a few tenths of a second again, he rushed out of his hiding place, and the eagle swooped down on the nearest ninja with his back to him, and at the same time threw the two darts that had been prepared in his hands towards the other two ninjas, one left and one right.

The man on the left dodged sideways, and the man on the right quickly drew his sword and blocked the dart in front of him. Although they didn't succeed, they also prevented the two from helping the sneak attack companion in the first place.

After knocking the man down from behind, he slammed a fist into his head to knock him unconscious, and then rushed towards the ninja on the right without stopping, and at the same time shot the zipline on the back of his hand with his left hand towards the ninja on the left.

The man on the right slashed with a knife, and the man on the left moved sideways to avoid the zipline and crashed into the wall behind. Roy rushed forward and dodged the knife while grabbing the back of the ninja on the right, and with a full pull of his left hand, he used a zipline capable of withstanding five hundred pounds to pull the wall behind the ninja on the left out of a wall brick, smashing the back of the ninja's head and smashing the guy to the ground on the spot.

The last ninja turned around and drew his sword, and the silver light was already in front of him in the blink of an eye. Roy also raised his arm as expected, and carried the knife with a sturdy glove, and almost at the same moment, three pitch-black sharp blades stretched out from each of the wrists of both hands, and with all the strength of his hands, the long knife broke into several pieces with a "dang" sound.

The broken blade, hidden in the wrist of the glove, is intended to be a surprise. Taking advantage of the ninja's sudden slash and involuntarily stunned, Roy's clenched fist and palm of his hand, something that had already been hidden in the palm of his hand pressed towards the ninja's chest, only to see that a delicate miniature thruster with three fumaroles had been pressed on it.

"Boom!"

With a loud roar of flames, three propulsion engine flames erupted from the ninja's chest, flying upside down like a spaceship at a speed close to a moving car, smashing through the wall behind him and falling unconscious among a pile of rubble.

Instantly get the three well-trained people, and the total time is only a few tens of seconds!