Cryogenic Blow

The next time you hit a creature with a weapon attack during this power's duration, the attack deals an extra 1d6 cold damage to the target. The target must make a Strength saving throw. On a failed save, it gains a level of slowed for the duration. At the start of each of its turns, the target can repeat the saving throw, ending the effect on itself on a success.

Overcharge Tech. If you cast this power using a tech slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.