Bag of Ice

You have a bag with 3 ice cubes. Throwing an ice cube at someone will freeze a target in place for one round. They cannot attack, yet also cannot be attacked. If the creature is resistant to freezing, you must roll an attack roll with disadvantage.

Once the last ice cube has been used, the bag must be filled with water and wait 1 long rest for the ice cubes to replenish.

The target must be less than or equal to the level of the wielder in either character level or CR. If the level or CR is greater than the level of the holder, the effect does nothing. 

Notes: Damage: Cold, Petrified