Certain-Kill Ice Spears

is one of Haku's techniques. The user unleashes giant spikes made of ice if they are endangered. Haku used this technique when he defended himself from his father when he attempted to kill him because of his kekkei genkai.

Trivia

 * While this technique wasn't named in the anime, its name appears in Naruto: Ultimate Ninja and Naruto: Ultimate Ninja 2.