Mito Chinoike invented a technique after she studied a metallic poison in the victim's bloodstream only to learn that it was Mercury, or 80Hg as it is commonly known, a toxic substance highly corrosive to the body and highly lethal if misused. Science and ninjutsu applied to this material resulted in a far more sinister technique, yet it pales in comparison to the Blaze Release: Kagutsuchi. The mist emitting from Mito's mouth comings fast and thick with a slight shimmering of mercury giving the mist a light blue color once released, controlling the thickness and volume with her Chakra in case she is surrounded by more than one enemy polluting the air with this toxic mist that blocks out sight making it difficult for them to see through it or out of it that even sunlight cannot pierce through it, the toxins would then take effect on their eyesight that even those with dojustu are rendered useless due to the intense corrosive metal that accumulates in their optic nerves resulting in a tremor of their eyelids and disturbances of vision, with continued exposure they'll lose eyesight with piercing, excruciating pain that follows.
The other effects of this technique are also lethal when it comes in contact with human beings and various other animals such as Ninken who are known used by members from the Inuzuka Clan, especially with their unique canine senses, would prove inevitably fatal to them, the mist would eat away at their body like corrosive acid burning the skin through physical contact and can affect other people even if they are standing fifteen feet from it small particles will linger about more outwards with minor injuries.
The longer a person stays inside Mito's mercury mist will feel their body grow heavy and weak following nausea, vomiting to inability to breathe caused by the metal eroding the lungs and their ability to breath allows the caster to dispatch them using Silent Killing or light the area ablaze using any source of fire that's wither chakra based or natural. A wind release user can manipulate the mercury-like mist by using a combined Wind Release: Air Current Wild Dance to spread it wider and farther covering an entire village even though it is capable of covering the populated area within a couple of hours if not more.