There was a smartphone inside the box. Although phones were not unusual in Martial City, this one stood out.

It was a high-end model from a major city, easily distinguishable by its oversized screen. What made Felix's expression darken was not the phone itself but the ominous feeling creeping over him.

After hesitating for a while, he carefully picked it up, his hands trembling slightly. He did not unlock it right away but instead flipped it over. The moment he saw the back, his jaw clenched