(Third update...)
At dusk, the gates of Walpurgis Royal Academy of Machinart welcomed the return of one man and two women.
However, unlike the cheerful atmosphere when they had left the academy, an indescribably oppressive air now surrounded the returning trio.
Walking behind, Wu Yan and Charlotte looked at Frey's back as she walked ahead of them, both wearing thoughtful expressions.
According to Frey, the canine-shaped Automatons, including Rabi, equipped with Magic Circuits for Sound Pressure Manipulation were collectively known as the Hellhound Series.
They were Taboo Automatons developed by Divine Works!
The Magic Circuit for Sound Pressure Manipulation was an exceptionally outstanding Magic Circuit!
It could control sound!
Automatons equipped with Magic Circuits for Sound Pressure Manipulation could use their control over sound to perform detection similar to ultrasound, conceal themselves by eliminating sound, and even transform sound into invisible blades for attack.
Whether in detection, concealment, or attack, Sound Pressure Manipulation could handle all of it. Its applications were broad, making it an extremely exceptional and useful Magic Circuit.
It was precisely because the Magic Circuit for Sound Pressure Manipulation was so excellent that Divine Works had obtained patents through it and drawn the attention of the British military.
However, precisely because Sound Pressure Manipulation was too outstanding and versatile, the burden of using it was simply too great for ordinary Automaton Masters to bear.
Thus, the Taboo Automatons of the Hellhound Series were born!
Divine Works used living dogs as materials, adding parts from living humans into the modified dogs' bodies. The Taboo Automatons developed in this manner were the Hellhound Series Automatons!
The birth of the Hellhound Series Automatons made the use of Sound Pressure Manipulation possible.
After all, Taboo Automatons contained parts from living humans and could generate magic power on their own to a