Heartfreeze

Necromancy (White) [cold]Tier: 3Components: VerbalCasting Time: 1 reactionRange: 5 ftTarget: Creature struck by your Ice BladeDuration: InstantaneousSaving Throw: Death partialThe warrior slumps, her lips blue, the wound frozen and bloodless. 

You can cast this spell when you critically hit an enemy with your Ice Blade. If the target fails its save, its heart freezes and it dies almost instantly. On a successful save, the target survives but is stunned for 1 round and shaken for 10 minutes.

Seekers Only: This spell counts as tier 2 instead of tier 3 for the purposes of spell mastery.