BACK IN THE DOMAIN OF [GUIDE BETWEEN THE WORLDS]
Arnold kept throwing the spears he made using his elemental abilities in what seemed like arbitrary directions but whenever he threw a spear, they clashed against something and these clashes were followed by a noise as if something broke.
It wasn't like everytime Arnold threw a spear it met its target, since the room was pitch black and he had to actually force his hearing ability to the point that he was able to recognise even the faintest sounds. This exceptional hearing wasn't a resultant of one of his abilities or subclasses, but it was the result of the mental training he had been going through for the past year.