Winter Kings Might

Question is about the default skill given from helm Winter King.

I have a really fun build with profs galore attempting to mimic a cold sort from D2. Build is based around Soulrend, alkamas ring set and winter king helm.

Aside from giving a run down of all skills and what not my real question is I can’t seem to notice that the skill from the helm seems to not do any damage? It should be doing 5k cold damage and 9k frostburn. Yet with those numbers I have spamed the skill and seen no damage given ( and no not on frost skeletons)

If this is a bug please fix.