Freezes all enemies around you for a few seconds(Whoa, couldnt have guessed from its name) The enemies regain their consciousness after a few seconds , but it is a good idea when you are surrounded. Also, read teleport if you are stuck in a bad situation.
Here, you will notice I am being attacked by multiple enemies. Freezing them for a few seconds also deals damage( therefore , a few may die) and the rest wake up after a few seconds. This gives you a breathing space