Black Shield: A Thousand Mirrors

The Black Shield: A Thousand Mirrors is an S-Rank Defensive  ; Its the most effective Blizzard Release Defensive Ninjutsu, as it creates over a thousand shields that are Nigh-indestructible and Reflect almost any Ninjutsu, Dojutsu or Kekkei Genkai, It is oftenly called the Universal Shield or the Shield of Gods because of its ability to cover dozens of square kilometers or create a spherical barrier, However the ability is ungodly taxing, almost enough to exhaust a tailed beast; Thats what awarded this jutsu's

The Only way to use this extremely powerful shield is to have the Blizzard Release of the Azure Clan; And also have the Kurobyougan; The only known users where Heiro Arashi Azure and Kagami Azure; Heiro's ancestor.

Appearance
The user must throw a Chakram or any spherical chakra-conductible link upwards, Then, Channeling huge ammounts of chakra with a mental command, the user can without any handseals create thousands of ice links, that connect with eachother dozens of times in many layers, making a practically inpenetrable barrier of ice, the user then cast an extra cloak of chakra above this dome, which turns into ice and receives an hexagonal pattern to it; This extra layer is the mirror aspect of the shield, that can potentially reflect any technique

Utility
It can block almost all Ninjutsu, Taijutsu and Genjutsu, Anything below the overpowered used by Nagato to transform konoha into a crater cannot even begin to crack it; the temperature of this shield is -273°C. or 0K, Which is the lowest temperature one object can go (Also known as Absolute Zero) which means this shield will require an enormous quantity of heat to melt, Not counting that the extra chakra coat in the outside keeps the shield at that temperature; The technique is extremely taxing, Enough to exhaust an Tailed Beast; Which means even Heiro; With his extremely huge reserves due to his Kurobyougan suffers from chakra exhaustion after keeping the shield active for any time over Fifteen minutes; When the user stops feeding the Barrier any more Chakra, the outside chakra coats will dissipate, removing the "Mirror" Aspect of the shield; And the Ice remaining from the technique will rapidly melt and evaporate in invisible gas;

Users
The only known users are Heiro Arashi Azure; Who used this technique to demonstrate the might of his self; And Kagami Azure, Heiro's ancestor that lived centuries before the Warring Estates Era, that used this technique to create a giant dome around her clan's homeland.