Jushō Akushon

Origin
The physical manifestation of a virulent duo; sculpted in the image of an archaic technique crafted by the Yondaime Otokage, a blight taking form through an innocuous medium, the ability to drown mongrels beneath a cancerous authority, achieved.

Overview
The user forces their chakra into the sky, influencing the clouds to gather upon the target area, if for some reason there was a clear sky above, the user simply would manifest their own. Once in place, a torrential downpour cascaded onto the area below with distinct purple hue.

The dokuton's influence within the rain gave it a caustic quality, feasting upon all forms of foreign chakra it came in contact with, in a similar fashion to Secret Technique: Mist Rain, the only notable differences between the two jutsu besides the obvious, were that since this retained the qualities of a poison, if allowed entry into a foreign body, whether it be through skin, or any orifice, the corrosive chakra infiltrated the chakra network of the afflicted corroding the system, leading to an insidious death.

Any rain allowed to hit the ground, rather than being wasted, was lifted to blanket the area in a dense cloud of mist, furthering an opponent's difficulty to manipulate a battle in their favor.