Blizz 2 is an AoE spell centered on yourself. It's great for early levels and perfect for FATE grinding when it's often hard to get off targeted casts.
However, perhaps its most useful property is its added effect: bind. Pre-freeze (if you stay THM, you won't have freeze), this is one of the only ways to bind an enemy in place which can be useful for pealing things off your healer or, if you obtain aggro from a monster, run up to your tank and cast it so it binds the monster near him. Swiftcast and blizz 2 work wonders in emergencies.
Sadly, most players do not realize what bind does. If you are near the binded target, it will attack you. Make sure to inform your party. :)
http://www.ffxiah.com/player/Bismarck/Hitome FFXIV: ARR
Hitome Mehan - Midgardsormr
Hito Yu - Midgardsormr