Guncho Tsurara (群鳥氷柱, Icicle Flock) is a Bankai technique used by Tōshirō Hitsugaya's Zanpakutō, Daiguren Hyōrinmaru.
Hitsugaya freezes the water around him, forming an array of icicle-like daggers which float around him in formation. By swinging his Zanpakutō in an arc, he launches the daggers at his target with high speed. The daggers are powerful enough to break through thick ice with ease whilst retaining their speed and trajectory. The icicles can reform themselves if they melt.