Cold Attack of the Demon Blade

Zabuza creates a Water Dragon (which is then frozen by Haku's Ice Release) and launches it at the opponent, trapping their body inside a pillar of ice. Haku follows it up by using his senbon to repeatedly attack the frozen enemy, weakening the icy prison in the process, after which, Zabuza slashes the pillar with his Kubikiribōchō, shattering the ice into thousands of pieces.