Why does it kill me?

I suppose you want an answer other than, because it's a blizzard?

Oh no you didn't ROFL

Yeah found it to be a very unproductive spell... Kind of a double edged blade, like when runes could damage you too.

I was never damaged by my own runes... :unsure2:

The only frost spell I use much is Ice Spike/Icy Spear. The AOE frost spells don't seem very powerful to me. *shrugs* And it's annoying getting accidentally caught in it...

no magic resist?

if i use it, my own healthbar doesn't move an inch