Upon hearing this, Fox, Black Wolf, and the others slightly startled, instinctively followed the direction Greg Jensen was looking in.
Indeed, five hundred meters away, they saw a series of clear footprints on the ground.
And it was just footprints they could see; there were no figures to accompany them. The assailants seemed to have completely blended into the night, so much so that no matter how wide they opened their eyes, they couldn't catch even the slightest clue of their presence.
"Hiss! Aren't these cyborgs' invisibility effects a bit too freakish? If Lord Dragon King hadn't thought of a countermeasure, I'm afraid Dragon King's Palace would have suffered a great loss tonight!"
Shocked, Fox sharply inhaled, no longer daring to be negligent. While complaining, he immediately sounded the alarm to notify all the warriors on the border to enter Level Ten Alert.