Freeze

Regular 
Turns water into solid ice. The ice retains the shape of its container; in open water, the affected volume freezes as a sphere or cube, at the caster’s option. A Shape Water spell may be cast to form the water before it is frozen, or to alter the shape of the ice after it is frozen.

Duration: The ice lasts until it melts naturally. 
Cost: 2 for an object up to the size of a fist, 4 for up to a cubic foot, 6 for a cubic yard, 3 more for each additional cubic yard. If the temperature is above freezing, the caster may maintain the spell by expending the casting cost once every 10 minutes. 
Time to cast: 10 seconds. 
Prerequisite: Shape Water.

Item 
Staff, wand, or jewelry.  
Cost to create: 200 energy, $100 blue gem.