[1.2.223] Aran Race Changes

I would like to know the exact mechanics of how the blizzard-like skill works, and what it means by "40 seconds". I really don't think it could be a cooldown, since it raises reletively quickly compared to the damage it would deal. Maybe a type of skill that does a massive initial damage, and if the monster is still standing, does a damage over time based on a percentage for the 40 seconds. Then again, it could be a cooldown. =)