Hou Niao remained silent, simply waiting in place until, after a moment, the Finger Cicada conveyed two tapping sounds again, signaling him to draw closer.
They chose not to speak loudly because, in such a Banyan Cave, sound wave propagation is a very dangerous means of communication. Sound waves would echo and bounce countless times within the complex structure of the Banyan Cave, lingering for a long time, not only making it difficult to hear clearly what was said but also potentially attracting many cave-dwelling creatures that navigate by sound, such as bats.
In such a deep and secluded cave, no one could guarantee that demon bats would not appear. Even if they could handle them, it would cause serious collective harm. They were there to search for opportunities, not to slaughter bat colonies.
Even as a Sword Cultivator, one should respect nature in different environments and honor each creature of the natural world.