Ice Knife

This spell fires a dagger of ice at the target. The caster makes a normal attack roll as if attacking with a missile weapon, factoring in the range from the attacker to the target (the ice knife has a long range of 30 yards, a medium range of 20 yards, and a short range of 10 yards). A successful hit causes 2-8 (2d4) hit points of damage. If the ice knife misses its target, consult the rules for grenade-like missiles to determine where it lands.
When an ice knife strikes a solid object or a creature, the knife shatters, releasing a wave of numbing cold. All creatures within a 5-foot radius must make a successful saving throw vs. paralyzation or suffer 1-4 hit points of cold damage and become numb for 1-3 rounds. Numbed creatures have their movement rates reduced by half and their chance to hit reduced by 2. Proximity to major sources of heat, such as a roaring bonfire, improves a creature's saving throw by +2.
An ice knife that misses or is lost cannot be picked up by the caster (or anyone else) and thrown again. If the ice knife is touched, it instantly shatters, releasing a wave of cold as described above. If a lost ice knife is not touched, it melts away in a pool of water 1 round after it was originally created; this melting occurs regardless of the environmental temperature.

[Complete Wizard's Handbook]

School: Evocation
Level: 2
Rarity: Rare

Range: Special
Components: V, S, M
Duration: Instantaneous
Casting Time: 1 round
Area of Effect: Special
Saving Throw: Negates

Material Components:
a drop of water from melted snow and a tiny silver dagger