Storm Summoning

 is a technique used by the manifested spirit of Tōshirō Hitsugaya's Zanpakutō, Hyōrinmaru.

Description
Hyōrinmaru creates a column of icy wind, which extends into the sky above him, causing storm clouds to gather overhead. This causes powerful, icy winds to blow through the area and lightning to crackle overhead, and allows Hyōrinmaru to use his abilities more effectively.