Senses 3 Volume 1

Just then, Izayoi felt a Tinnitus at his ears. This is because, though Izayoi might not be as good as Yō in terms of hearing but his senses were far better than normal people and that allowed him to recognize that frequency of sound waves.

(That sound wave......Oh, I see, so that's how it is?)

Seeming to have understood everything, the corners of Izayoi's lips curved upwards in a slight smile.

-The invisible knight used the Gift of Hades Helmet to completely erase his presence. This Gift, which was created to assassinate the Gods, could hide the user's heat signature, smell and even sound. Even if up against a visually poor snake that used its sensitive heat probe organ ......it will not be able to capture the user's location.

(The enemy's at a position of ten meters away observing the situation, there's no problem, he doesn't seem to have taken notice yet.)

However, this Gift of Invisibility had a fatal weakness.

This Gift's ability was to make one transparent rather than completely permeable.

For example, the sound waves emitted by dolphins or bats and submarines which copy that with a sonar function to rely on the reflected sonar waves to explore the area. That would be able to counter this Gift of Invisibility.

(......! Coming!)

The invisible knight may have thought to directly score a hit as he launched his attack on Yō from the left.