Tensō Jūrin

is a technique used by Tōshirō Hitsugaya's Zanpakutō, Hyōrinmaru.

Description
It is one of Hyōrinmaru's basic powers, as well as its strongest. It allows him to control the weather in the immediate vicinity, or more specifically, control the water in the surrounding atmosphere. The ability is usable in both Shikai and Bankai modes. However, Hitsugaya states that this aspect of his powers is not fully mature and that he doesn't like to use it in Bankai mode, as he is unsure of whether or not he could control it and keep it from killing everyone in the vicinity.