Expertise


 * Expertise attribute is one of the most powerful attribute.
 * Each point of Expertise reduces cost of affected skills by 4%.
 * Energy cost reduced in this way is not rounded, decimals are taken into account.
 * Expertise works on skills of other classes too, but never a spell.
 * This attribute does not lower the Energy cost that is shown by the skill; but when you use it, Expertise will kick in.