Castle of Black Iron

Zhang Tie's flight speed was 3,487 m/s, which was close to 10 times the speed of sound.

The speed of spear that Zhang Tie could throw at rest was 1,689 m/s, which was close to 5 times the speed of sound.

When in flight, the moment the spear left Zhang Tie's hand, although its speed being relative to Zhang Tie was 1,689 m/s, its real speed was 5,176 m/s, ignoring the gravity acceleration from over 1,000 m high.

When the spear hit the building, its kinetic energy was 750,147,328 Joules. The moment the spear left his hand, Zhang Tie had got its kinetic energy through his powerful mental arithmetic by abacus.

According to the standard before the Catastrophe, the kinetic energy of over 750 million Joules was almost equal to the explosive quantitive of 180 kg's TNT.

Of course, in this age, there was no explosive except for alchemist's bomb; additionally, the strike of kinetic weapon was more concentrative and more destructive to a single target.

When the spear hit the building, over 10 floors' structure was collapsed at once, causing dust and broken stones flying in all directions.

After that, Zhang Tie threw out another two spears and hit the remaining part of the building. As a result, the entire building collapsed, leaving a huge pit on the ground whose diameter was a few meters.

Then, Zhang Tie tried to manipulate an object to attack his target with the ability of divine dominator.

Zhang Tie found that the inertia of his body in high-speed flight couldn't be passed to the object which was under control by his spiritual energy. When he controlled an object, the object's flight orientation was consistent with his flight orientation; additionally, the object under the control of spiritual energy could only fly as fast as the maximal speed of his body. Only when he threw out his spear by hand could his flight speed and inertia be passed to the spear.

Normally, the kinetic energy of a spear weighing 56 kg at the speed of 1,689 m/s was 79,876,188 Joule.

However, at 10 times the speed of sound in the air, the kinetic energy of spear which was thrown out by his hand was 750,147,328 Joules.

By contrast, it was a difference of 9.39 times. If he could further increase his flight speed, this sharp difference could be further enlarged.

The power of spear was out of Zhang Tie's imagination. However, Zhang Tie felt the 50-odd kg's spear was too light to play the effect of the kinetic strike. He had not fully exerted his strength yet. He could increase the kinetic energy of this spear by a few more times.

Launching an attack by a spear in flight with the ability of divine dominator was the swiftest, simplest and most powerful kinetic strike pattern for Zhang Tie.

'As long as I could easily kill a black iron knight by a spear in this way, does it mean that I could kill all the black iron demon knights in an overwhelming way like killing ants? Even heavenly knights couldn't do it.'

Zhang Tie couldn't help getting thrilled because he realized that a bright avenue of cultivation was right in front of his eyes. As long as he combined speed and strength, he would defeat all the opponents. Speed and strength were his greatest advantages. From then on, the combat mode of divine dominator would enter a completely new realm. At the same time, he had one more powerful trump card that could change the situation.

'F*ck, I became a humanoid hypersonic strategic bomber that could fire momentum weapons!'

After looking at the collapsed building and thinking about his achievement, Zhang Tie exited the trouble-reappearance situation immediately...

...

After opening his eyes, Zhang Tie saw Heller under the small tree. Heller might have already known that Zhang Tie would wake up at this moment.

"Castle Lord, you might have made an achievement in the trouble-reappearance situation!"

Zhang Tie stood up as he revealed a confident and brilliant smile before saying, "I just suddenly realize what I should do in the future..." After saying that, Zhang Tie seriously looked at Heller's calm smile and wise eye light for a short while. He then immediately realized, "Have you long known about the secret of kinetic weapon? You should have long told me about that. If not raid the expeditionary corps of Sacred Light Empire, I might have not discovered that I could have such a powerful striking means!"

"When Castle Lord could fly at an increasingly higher speed with the ability of divine dominator, the so-called secret of kinetic weapon would just be a window paper which would be broken sooner or later. If I told you too early, I might have influenced your cultivation base and exploration in fighting skills. It's not good. No matter what, although you have promoted to a knight, you have to observe the world with your own eyes and sense and think about the world using your own brain. Only in this way could you get a real and reliable experience and gnosis. Castle Lord, if I told you about the striking mode that you could select when you were in a hypersonic flight, would you still have such an excited and deep feeling?"

"Well, you're right!" Zhang Tie didn't argue with Heller on this event because it was Heller's usual demeanor. Heller never provided any excessive suggestion for his road of cultivation; instead, Heller just worked as the steward of Castle of Black Iron and gave him some tips at most. Zhang Tie then asked Heller, "Do you think the kinetic strike is promising or not?"

"The power of kinetic strike is closely related to strength and speed. The extreme strength is close to the universal law. Castle Lord, don't you want to look at the scenery in extreme strength and speed. Additionally, Castle Lord's kinetic strike could already match a mini tactic nuclear weapon before the Catastrophe. In the future, as Castle Lord's battle strength gradually increases, Castle Lord's kinetic strike would grow increasingly more and more powerful. How could such a powerful, simple and efficient striking means be not promising in the holy war? Castle Lord, did you see anyone else among humans who could use the same means?"

Zhang Tie understood Heller's words. It was Heller's first time to advocate a striking means so much. Heller's words made Zhang Tie further strengthen his belief.

'This way is definitely promising!'

"Speaking of increasing the power of kinetic strike, I think those jerk pastors of Sacred Light Empire must have left something for me!"

Zhang Tie looked up at the brilliant fruit of brilliance and the fruit of judgment as his eyes shone at once...