Users can construct bladed weapons of various shapes and sizes out of ice. They able to manipulate the blade, making it extremely sharp, allowing them to freeze surrounding area or unleashing shards of ice that are capable of penetrating anything.
Esdeath (Akame Ga Kill!) forming an icicle blade that can slice through steel bars.
Nami Kusunoki (Alive: The Final Evolution) forming claw blades out of ice that she can use in conjunction with her martial arts and fire off as bullets.
Rukia Kuchiki (Bleach) forming a blade out of ice from the broken part of her sword.
Tōshirō Hitsugaya (Bleach) forming ice with a vacuum inside, creating a thin and very sharp ice blade.
Girom (Marchen Awakens Romance) is able to construct blades out of the ice created from his ÄRM, Iced Earth. He used this to cruelly kill his War Games teammate Aqua after she lost her battle against Nanashi.
Snow’s (Marchen Awakens Romance) ÄRM Ice Ring freezes the water molecules around her hand to form a blade made of ice.
Haku (Naruto) using Certain-Kill Ice Spears to destroy his own cottage and kill his pursuers in self-defense.
Kuzan (One Piece) using Ice Block: Partisan to create spears of ice that he throws with deadly accuracy and force.
Brook (One Piece) infusing his soul energy into his Soul Solid, creating a spiritual blade of intense coldness.
Mizore Shirayuki (Rosario + Vampire) forming claw blades out of ice...
...as well as ice kunai.
Tōya (Yu Yu Hakusho) can use his ability over ice to freeze water molecules around his arm, forming his Cursed Ice Blade.