Rokui Hyōketsujin

is a technique of Tōshirō Hitsugaya's Zanpakutō, Hyōrinmaru.

Description
Hitsugaya places six snowflake-shaped ice crystals on the ground in a hexagonal formation. When an opponent steps within the formation, each snowflake sends a line of ice towards them. The space within the pentagon is encased in a large pillar of ice, trapping the opponent.