At almost the same moment, both the knowledge fairy and Vicky turned their heads toward the source of the sound.
What they saw was the Envoy of Filth, who had disappeared from the Angel Guild headquarters for some time. However, the expression on the Envoy of Filth's face was quite peculiar; he looked at the knowledge fairy with a half-smile that was neither friendly nor hostile.
Vicky took a step back. Although she had never interacted with the Envoy of Filth or fought against him, she felt an overwhelming sense of danger emanating from him.
At that moment, the knowledge fairy transformed into a massive book. The knowledge fairy opened the book, releasing a torrent of spells that surged toward the Envoy of Filth.
The Envoy of Filth merely raised his left hand slightly. A barrier composed of chaotic energy materialized, effortlessly blocking all of the magical attacks.