Wind Release: Curse Technique: Eternal Void

Kan shapes Genshiku into blades, one invisible and the other black. Upon inflicting injuries on the target, they don't heal by any means whatsoever, cursing the target with eternal injuries. The invisible blade passes through all defenses, while the black blade voids all before it. Upon everyone looking at Genshiku, they will see it as normal wind, though due to its void nature, won't be able to tell it has any special effects, even from prolonged activation and usage. Upon looking away from it, all memories or recordings of its existence will vanish from all history, making it impossible for another to replicate it outside of Kan teaching it. At any given time, Kan is able to exted the reach of these blades by using either his own wind, or natural wind and the vacuum between it, literally allowing him to modify the blades length to his will, instantaneously.