Encountering Black Shadow on Earth was something Hua Zhen had never expected. Black Shadow invited him to sit down and said they could just have a nice chat. Hua Zhen would have been a complete idiot to believe that nonsense.
From the moment he learned Black Shadow's identity, Hua Zhen had been on guard. When Black Shadow resentfully spat out those final words and suddenly attacked, Hua Zhen, who had long been prepared, immediately struck back and transferred him above North Star.
All of this happened in the blink of an eye, which was why the massive explosion appeared in the sky rather than inside the restaurant.
As for the sight Qi Lin saw of the sky splitting open, that was merely because the Wormhole Circuit Hua Zhen had deployed for protection had been shattered by the blast.
If he had encountered Black Shadow on an unfamiliar planet, Hua Zhen could not have cared less whether the life on that planet was caught in the crossfire. Fighting Black Shadow had always been a fight to the death. If Hua Zhen let his guard down even slightly, he could fall victim to Black Shadow's tricks at any moment. How could he possibly spare the attention to care whether others lived or died? He would simply consider those lives unlucky.
However, North Star—or rather, Earth—was different. Perhaps as people grew older, they became nostalgic for the past. Earth could be said to be Hua Zhen's only remaining connection to his previous life. He could not simply stand by and ignore what happened here, so it was only natural that he stepped in to protect it.
Because the Wormhole Circuit completely covered all of North Star, the civilians in the city did not suffer much damage, though they were still badly frightened.
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