Chance to Cast Blizzard when Struck

Every source of a stat: magic and rare affixes, uniques, set items and runewords.

Blizzard skill page

RollSourceRolls onalvlclvlQuality
15% Chance to Cast Level 28 Blizzard when StruckArs Dul'MephistosOccult Tome78Unique
5% Chance to Cast Level 7-19 Blizzard when StruckSnowclashBattle Belt42Unique
4% Chance to Cast Level 6 Blizzard when StruckStormchaserScutum35Unique