Before this, Du You had already tested it. Lin Yucha's Demon Concealment Skill was an incredibly unique cloaking ability, not simply optical invisibility. After employing the skill, every trace of Lin Yucha would vanish from perception.
Using various instruments in his air command center, Du You tried to locate her, but to no avail.
The Blood-colored Empire was even more adept in biotechnology, and his own skills were primarily designed to counter biological entities. When even the tech gadgets couldn't detect her, Du You naturally felt reassured.
Right enough, as Lin Yucha moved forward, she didn't catch anyone's attention.
Shortly after, her command to attack came through the terminal. "Three, two, one, attack."
As the command commenced, Lin Yushi vanished without a trace. When Lin Yucha had earlier passed by, she had taken with her the Space Arrow her sister had given her. This object, wouldn't raise any alarms in the testing equipment.