Blizzard Strike

Conjuration [air, cold]
Tier: 1 
Components: Verbal, Somatic 
Casting Time: 1 major action 
Range: Touch 
Target: Your Ice Blade 
Duration: 1 minute, or until discharged
Saving Throw: None 
A whirlwind of ice and freezing snow forms around your blade, waiting to be unleashed.

You bind a freezing windstorm to your blade, and unleash it with a strike. The spell is discharged the next time you hit a target with your iceblade, dealing 1d6 cold damage. Additionally, the blizzard pushes both of you back with great force. You are automatically pushed back 10 ft and the target is subject to a bull rush attempt (the spell has a +8 bonus on this check).

Your movement occurs first and does not provoke reaction attacks. 

Augment:
For each additional spell point you invest, you can increase the damage by 1d6 (up to a maximum total of [½ caster level] d6). For each extra d6, the spell gains an additional +2 bonus on the Strength check.