All your spells deal 16% increased damage against Frozen targetsFingers of Frost now increases the damage of Ice Lance by an additional 16%, and Brain Freeze increases the damage of the instant Frostfire Bolt by 16%. Increases the damage done by your Water Elemental by 16%. Mage - Frost Spec.
Oh and also, Temporal Shield got 15% damage reduction aswell..
Worst changes coming for 5.4 guys, mages are out after this.
[Edit to clarify math]
It's not that big, but somewhere between 30-40% damage reduction.
Edited by Crawthz, 20 June 2013 - 12:17 AM.