Without other options, Cairo just decided to erect as many defenses for his ears. Even if sound magic can pass through barriers, it would still weaken a bit
The only problem would be if there are more than 1 of his enemies that can use sound magic. That would make this harder for him and he needs to find them as soon as possible
Cairo might have the confidence and ability to keep up with such a high number of enemies but he is still only one person. He was even disconnected from his clones and he cannot use them to bolster his power
As a result, Cairo uses the mana in his surroundings and turned them into multiple eyes to search for the sound magic user. Fortunately, with the tower's help, Cairo's soul was much stronger than other mages at his level
The soul quality was simply world's apart and cannot even be compared to each other. It was like comparing an ordinary stone to the most precious jewel in the world
