Inaccurate?

Ice Shape

(Frostburn)

Transmutation [Cold]
Level: Cleric 3, Druid 3, Disciple of Thrym 3, Sorcerer 5, Wizard 5,
Components: V, S, M, DF,
Casting Time: 1 standard action
Range: Touch
Area: Ice touched, up to 10 cu. ft. + 1 cu. ft./level
Duration: Instantaneous
Saving Throw: None
Spell Resistance: No

You can form an existing piece of ice into any shape that suits your purpose.
For example, you can make an ice weapon, a special trapdoor, or a crude idol.
Ice shape also permits you to reshape an ice door to make an exit where one didn't exist or to seal a door shut.
While it's possible to make crude coffers, doors, and so forth with ice shape, fine detail isn't possible.
There is a 30% chance that any shape including moving parts simply doesn't work.
Arcane Material Component: Slush, which must be spread into roughly the desired shape of the ice object and then touched to the ice while the verbal component is uttered.