With a loud bang, the sky shook and the earth shook, and the bodies of the mountain and earth shook several times before they stabilized again.

Through the roof leak peeking out of the giant pipe, a huge cannonball can be seen shooting into the depths of the sky.

But then there was a muffled "boom", which came from a distance, and the tremors followed, almost at the same time as the muffled sound.

"It's the Tower of the Sky. Earth reacted the fastest, turning his head in the direction of the device club.

"Go up and have a look. The metal mouth said and flew towards the roof. At the base of the round pipe, a metal ladder slowly rises to the outside of the roof leak.

The mountain climbed the ladder to the outside of the house, and the earth followed him. Outside the roof, a small platform for two or three people can stand on the top of the giant pipe. Shan and Tu stood on the platform, looking at the Sky Exploration Tower that was slowly flying into the sky in the distance. The metal beak hovered beside the two of them with its wings flapped.

Yama turned his head to look out of Gear City, where the behemoth Hisuro was tangled with an iron giant, a metal whirlwind whipped up countless discarded parts swirling around them. Although it will be difficult for the two "giant beasts" to tell the winner for a while, the mountain knows very well that in half an hour at most, the waste cleanup will be over. At that point, the Iron Giant will be decomposed and eaten, leaving behind a piece of residue that will become part of the Parts Desert.

"Their goal is not to go up to the sky to find the exit of the box. "I just calculated the trajectory of the Sky Explorer. In this direction, when the next section of the building falls off, you will be able to see that there is something wrong with the direction of flight. ”

"Flying in this direction, where will the Sky Exploration Tower fly?" Shan asked.

"It's hard to say, it's easy to judge when the second section of the building falls off. ”

Mountains and earth stared silently at the Sky Explorer. A few minutes later, a section of fire flickered below the Sky Exploration Tower, and an explosion could be heard in the distance. The bottom section of the tower descends, while the remaining towers soar upwards at an even faster rate. As the metal mouth said, the direction of travel pointed by the spire of the Sky Exploration Tower has shifted significantly.

"If you ascend in this direction, the last section of the tower will pass through the highest point and fall there," Tu said. His fingers arced in the air, and the final point of his fingertips was the place where Hisulu had fought the Iron Giant.

"Is the target a scrap disposal site?" asked Yama in a low voice.

Metalmouth didn't answer right away, but he was clearly still doing the math. After nearly two minutes, the metal mouth said: "Although the second section has not fallen off yet, according to the direction that can be seen so far, there is indeed a high probability that it will fall down the arc after the Sky Exploration Tower reaches the highest point and fall into the scrap disposal yard." He also came to the same conclusion as Tu.

"When will the scrap cleanup end?" Shan asked, turning to Tu.

"Thirty-two minutes later. "The soil gives a precise time.

"How long will it take for the Sky Explorer to fall into the scrap disposal site?" asked Shan again.

"It's hard to calculate exactly, and when the second quarter comes off, maybe I'll be able to give a time, and now I can only tell you that it's within an hour. Tu thought for a moment and said.

"How long will it take for the Nest of Steel to receive our message to them?" asked Shan, the third.

Before Earth could reply, Metalbeak corrected, "You should ask how long it will take for the Nest of Steel to react." I can tell you that it will take at least two hours or more. ”

"You're more experienced than I am in this area. "That means that within two hours, we must judge and be prepared for our own actions, and the Nest of Steel will not be able to help us." ”

"We don't know what's underneath the scrap site, it's hard to judge why the Device Club launched the Sky Explorer there, and maybe that's not their purpose, but the intentions of the forces outside the box behind them," said the metal mouth. ”

"I've heard from the two newcomers that they seem to have entered Cogwheel City through the underground passage below the cleanup site during the last scrap cleanup. Mountain said.

"Where are those two fuels now?" asked Metalmouth.

"They refused to execute the plan and didn't come back with the cloud. ”

"Let the clouds find them and tell them where Catherine has landed in the Sky Tower. Let's just say that if they're willing to go with Yun to investigate, I can show them a possible way out of here. ”

"Is there really such a road?" asked Shan, staring at the metal mouth.

"Jack Jack. Perhaps, the whirlpool in the center of the molten steel lake that Iron Tooth found underground may actually be able to reach the outside. The metal mouth let out an ugly dry laugh.

Cloud stood at the edge of the training ground, and in the extreme distance, the Sky Exploration Tower had become a small dot in the sky. However, Cloud's target is not the Sky Exploration Tower, she is searching for Catherine and the others. Since the previous breakup, Catherine and the others have disappeared in their strange flying machines. The clouds checked the sky around Screw Alley, but could not find any trace of them.

But it doesn't matter, even if you can't find Catherine and the two, the boss has other options. Yun glanced at the metal disc in his palm, the surface of the disc was engraved with intricate metal lines, there was a circle of scales around the circle, and a red hand in the center was constantly swaying from side to side. It is believed that it will not take long for the swing of the hands to stop, and the position of Catherine and the others will be indicated. This pointing disc can track Catherine's strange flying machine. The closer the pointing disc and the strange flying machine are, the more clearly the pointer is pointed. As long as the cloud waits patiently now, the specific direction will soon have results.

Sure enough, after another five minutes, the red pointer stopped swinging, but the pointer actually pointed at Yun himself. Yun thought for a few seconds and turned to look, and behind him was the building itself where Screw Alley was located. She was standing on the edge of the training ground platform that extended from the center of the building, a theoretical distance of one or two hundred meters from the Screw Alley.

But Catherine and the others couldn't have hid in Screw Alley, and that would have been discovered.

The clouds looked up at the sky, and the upper end of the screw alley was hidden in the clouds. If that strange flying machine was hiding above this cloud, it would be really hard to spot.

The cloud flickered and disappeared in place.

On the platform at the top of Screw Alley, Yun looked at a fist-sized flying object above his head. It's still some distance, but it's enough to see that it's Catherine's strange flying machine.

Behind the clouds, the iron feather unfolded, jumped off the platform, and then soared into the sky and flew upward. As the altitude changes, the view of the clouds becomes clearer and clearer as the huge eyeball-like aircraft becomes clearer. In the eyeballs, the figures of Catherine and the Ice Bear Abyss are also clear.

I saw Catherine holding an air cannon in her hand and shouting at Yun, "Yun, we said we wouldn't go with you to the Device Club to investigate, what are you looking for now? ”