Sunder

Description
All enemies with Frost are hit for 150 damage, and 1 Fragile is applied to them.

Strategy and Synergy
Sunder synergizes with spells that apply Frost, especially those that apply it on multiple targets such as Blizzard. However, without any way to apply Frost - Sunder is useless.

It is important to be aware of how many Frost applications your target has, as Frost clears itself every third Frost stack.