"The two of them?"
Yu Luo looked curiously toward where Shi Feng was staring, unable to help feeling a sense of strangeness.
There was clearly no one there. Even when she pushed the perception of her Vacuum Realm to its limit, she still could not sense any living aura, presence, or unnatural fluctuations in the surrounding space.
One had to know that any expert who reached the Vacuum Realm had complete awareness of every slightest movement around them. An assassin's stealth was ultimately only a form of invisibility. So long as they moved, various flaws would arise. No matter how slow or gentle their movements were, they would stir the air and cause unnatural disturbances in space.
Even a top-tier assassin expert could not get within twenty or thirty yards of a Vacuum Realm expert without being detected. Normally, they could only operate beyond thirty yards. As for those monsters in the Domain Realm, it was extremely difficult for them to enter within twenty yards of a Vacuum Realm expert. At most, they could remain undetected for a few seconds.
Yet the place Shi Feng was looking at was less than twenty yards away from them. Moreover, the two had been chatting for quite some time. Even a Domain Realm expert could not have remained hidden for so long.
Lionheart Boiling Blood, however, was briefly stunned. His gaze toward Shi Feng gained a trace of vigilance and admiration.
"Impressive! As expected of a Tier 4 expert capable of traveling to and from the main cities."
This time, he had brought Wind Chaser and Crimson Wave over partly to test Shi Feng's capabilities. In terms of stealth, Crimson Wave ranked second in the Heavenly Flame Adventure Group. Not only had she developed a unique stealth movement method by applying the characteristics