Deep Freeze is the 51-point talent in the Frost tree for Mages. It was introduced in Patch 3.0.2.
Deep Freeze causes a target to be considered Frozen for the duration of its stun, turning it into yet another tool for Frost mages to perform Shatter Combos with.
Glyph of Deep Freeze
Tips and Tactics
This spell is best used at the very end of a Frost Nova to maximize the opponent's Shatter-able and stationary time and minimize the risk of them trinketing the effect right away. It can be somewhat reliably used as an interrupt when coupled with Fingers of Frost.
Note, however that this spell is not off the GCD. It is subject to diminishing returns in the controlled stun category (such as Cheap Shot) and Frost Nova, Frostbite and Shattered Barrier will not diminish the results of Deep Freeze.
The 3.3 changes allow for this talent to hit bosses in PvE for a massive quantity of damage (while FoF is up, naturally.) If Fingers of Frost procs, you can use a charge (or the "ghost charge") to deliver a massive spike of Deep Freeze damage. This will do far more damage than Frostbolt. This applies to all raid bosses, most or all dungeon bosses and many elites.
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