Xu Zimo's words now carried a faint hint of threat.
Given the temperaments of these old men, they would certainly have fought.
Yet they could not remain indifferent to Xu Zimo's threat, nor could they turn a blind eye to it.
After all, the Dragon Tree was of utmost importance.
It concerned the energy supply of all Green City.
If the Dragon Tree truly suffered fatal damage, Green City would likely be plunged into crisis for some time.
Under such circumstances, did they dare gamble?
Xu Zimo had also realized that present-day Undying Star seemed to have embarked on a path where technology and intelligence reigned supreme.
Yet behind all that, aside from the seemingly cool mechas, what supported them was an immense energy system.
Xu Zimo had previously asked Lu Ling.
What exactly were the so-called Dragon Veins or Dragon Trees?
Lu Ling did not know either.
She had only told Xu Zimo that on Undying Star, many large cities had places similar to Dragon Veins.
They supplied energy to the entire city.
Lu Ling had also said that although Green City was a major city in the northwest, it was not actually very developed.
The truly developed cities were all in the south.
Development there changed with each passing day. Technology had long since benefited the common people, and people's food, clothing, daily needs, and travel had all become inseparable from it.
This made Xu Zimo extremely curious.
What kind of world would that be?
After learning the function of the Dragon Veins, Xu Zimo became even more fearless.
If they wanted to fight, he would accompany them.
But once the Dragon Vein was destroyed, the consequences would not be something anyone could bear.
The old men exchanged glances, silently reaching an understanding.
The leading old man said,