Sage Art: Voice of the Kaiser

More a passive ability than a technique requiring activation, while in Dragon Sage Mode Yūmei emits a sound-based genjutsu amidst his speech patterns, which alone is capable of mentally manipulating weaker willed beings into seeing multiple copies of him, feeble illusions constantly transitioning across their field of vision, his words echoing throughout their mind. Not only does it constantly interrupt the thought process' of those affected by it, but if exposed to it for too long it can mentally break them into mindless vegetables.

As it is sound-based, constant and louder noise interferences can delay the onset of its effect, however unless muting out the majority of its volume then even Wind Release would pose no threat to it. Only those of an ANBU-level or higher are capable of enduring it, lest their vulnerability to it is reduced in some way or another (such as by physically or mentally weakening their present state).