Identity set affix

How identity affix works? It says 12.5% dmg of spell from other class? What is it what is its effect advantage and disadvantage? Thx

For example you have a warrior. And equiped a proc skill like storm. The damage of the storm will increase with identity since it is a skill from wizard class. Also, using amber crystal on MH and OH can change specials skills of different class on your weapons

Identity. if you are using spell from other class. it will increase your DMG. im also using Identity. :+1: