Byakuya Kekkai

Byakuya Kekkai (白夜結界, lit. "White Night Barrier") is a Noble Art of Shizuku Kurogane.

Description
Byakuya Kekkai is a Noble Art that allows the user to cover a certain area in thick mist, by converting frozen ice into vapor, in an instant. The user is able to sense everything in the mist, including the opponents moves. Naturally, the mist also hinders the opponents eyesight.

Weakness
It has been shown that a powerful enough attack, can destroy Byakuya Kekkai, such as Touka Toudou's Raikiri. The hindered vision can also be overcome with techniques like, Reverse Sight.