Kekkei Genkai: Ice release (氷遁, Hyōton; Viz "Haku's Secret Arts of Water", English TV "Ice Style") allowed Haku to combine wind and water-based chakra to create ice which he could manipulate through willpower alone. The ice Haku created was largely immune to fire-based attacks, only melting slightly when coming into contact with flames. Using his special ability, Haku developed the Demonic Ice Crystal Mirrors, which allowed him to create any number of mirrors made of ice to use as a shield or trap an opponent.
Name: Demonic Ice Mirrors
Rank: N/A
Type: Ninjutsu
Style: Ice
Description: Using his kekkei genkai, Haku can create a dome of twenty-one mirrors made out of ice to trap an opponent. Twelve remain at ground level, eight are placed above the first twelve and angled toward the ground, and the final mirror is above the rest and facing the ground. Haku can then enter one of the mirrors and instantly transport to another mirror. While moving about he bombards the opponent with attacks at very high speeds, such that the rest of the world appear to be moving in slow motion compared to him. If the mirror Haku is in is broken, he can leap out of one of the fragments and continue his attack or move to another mirror. The technique requires a large amount of chakra to maintain, so Haku's movement becomes progressively slower the longer he maintains the mirrors.
Though they are made from ice, the mirrors are resistant to at least low level fire techniques (Sasuke's Fire Release: Great Fireball Technique was barely able to make the rim frost melt).
Name: Demonic Mirror Ice Blas
Rank: N/A
Type: Ninjutsu
Style: Ice
Description: While the Victim is trapped in the mirrors the Mirrors will simultaneously explode into glass shards that are too pierce the victim while the user gets away just in time.
Name: Ice Release: Swallow Snow Storm
Rank: C
Type: Ninjutsu
Style: Ice
Description: This jutsu creates a cluster of ice needles in the shape of miniature swallows, which the user then throws at the opponent. These needles can change direction in midair and will maim the opponent with their sharp wings.This jutsu cannot be eliminated by Fire techniques
Name: Ice Spikes
Rank: N/A
Type: Ninjutsu
Style: Ice
Description: The user unleashes giant spikes made of ice if they are endangered. Haku used this when he defends himself from his father when he attempted to kill him because of his Kekkei Genkai. This jutsu is able to impale multiple times in the area of a small house.
Name: Ice Prison Technique
Rank: B
Type: Ninjutsu
Style: Ice
Description: This jutsu allows the user to infuse their chakra with ice underground and bring it to the surface. The user can then trap their opponent within the ice by controlling its movements and completely surrounding them in the ice. This jutsu is strong enough to withstand basic fire jutsu, because the ice has already been infused with the user's chakra. This allows this jutsu to double as a defensive technique, by the user encasing themselves in the ice.