This cursed technique allows the user to lower the temperature around to extreme levels of cold. These freezing temperatures allow the user to produce ice and frost at will. The user can generate multiple sheets of solid ice by simply touching a surface. They can also manifest other forms of ice such as a cloud of frozen mist. Ice can also be cryokinetically controlled by the user, allowing them to levitate it through the air using only their mind,
Uraume is highly proficient user of their high-level ice technique. They can produce massive amounts of ice and utilize it with deadly precision. Using Frost Calm, Uraume incapacitated several sorcerers in an instant. All of whom were around semi-grade 1 or higher and commended the strength of Uraume's technique. They recognized that even one wrong move could rip their body's apart Uraume even managed to freeze several targets all while avoiding Sukuna's vessel, showcasing their refined control over manipulating the ice.
Choso's Blood Manipulation nearly proved to be a good counter to the ice. He threatened to escape his frozen prison by manipulating the temperature of his own blood. Uraume responded to him with a frozen sharp fingertip pointed at his forehead and threatened to apply even more ice to him. Yuji managed to free Choso but they were both frozen once again by Uraume's Icefall technique.
Uraume's second extension technique not only froze their targets but nearly killed them by raining down giant icicles on their heads. However, Uraume's victims were all rescued by special grade sorcerer Yuki Tsukumo. Yuki was able to break apart some of the ice so the nobody suffered fatal wounds. Even so, much of the battlefield remained frozen and laid with giant icicles.
This technique requires the user to maintain some degree of focus in order to maintain the ice's integrity. Uraume was poisoned by an attack from Choso's blood.When the toxin took effect, Uraume collapsed to one leg and all the ice holding their victims immediately melted away.