Chance to Cast Frost Nova when Struck

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

Frost Nova skill page

RollSourceRolls onalvlclvlQuality
10% Chance to Cast Level 3 Frost Nova when StruckDangoon's TeachingHeaven's BrethrenReinforced Mace68Set
5% Chance to Cast Level 3 Frost Nova when Struckof Frost ShieldArmor, Amulets129Magic · Rare
5% Chance to Cast Level 9 Frost Nova when StruckTiamat's RebukeDragon Shield38Unique