Ryūsenka

is a technique of Tōshirō Hitsugaya's Bankai, Daiguren Hyōrinmaru.

Description
When Hitsugaya stabs his opponents, a huge burst of ice erupts from the point of contact between Hyōrinmaru and the opponent, encasing and freezing them. Hitsugaya can then proceed to shatter the ice and his opponent with it.