Icicle Dagger

Conjuration (Creation) [cold]
Level: Artificer * 1, Bloodrager * 1, Sorcerer */Wizard * 1, Summoner * 1, Warlock * 1
Components: V, S
Casting Time: 1 Standard Action
Range: 0 ft.
Effect: one icicle
Duration: 1 minute/level
Saving Throw: None
Spell Resistance: no
  You create a masterwork dagger out of ice. The dagger deals 1 point of cold damage in addition to normal dagger damage.
  If the dagger leaves your hand for more than 1 round, it melts and the spell ends. At 6th level, the dagger functions as a +1 frost dagger. At 11th level, it gains the returning property when thrown, melting away and reforming in your hand just before your next turn.