Ice Knife is a daily power available to Wizards at 5th level[HotEC]
Ice Knife
Wizard Attack 5
Hurling a blade of ice against your foe causes the ice to explode into jagged shards that tear through anything they hit
Daily ✦ drace, cold, evocation, implement
Target: One Creature
Attack: Intelligence Vs. Reflex
Hit: 2d8 + Intelligence modifier cold damage, and the primary target is immobilized (save ends)
Miss: Half damage
Effect: Make the secondary attack
Area burst 2 centered on the primary target
Secondary Target: Each creature in the burst other than the primary target
Secondary Attack: Intelligence vs. Fortitude
Hit: 5 cold damage, and the secondary target takes a -2 penalty to AC (save ends)