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World of Warcraft Upgrades and Item Upgrading Upgrades can boost the value of certain numeric statistics on armor, weapons and rings. Upgrades can also boost bonuses like Crit chance and damage from PvE. If the template for upgrading a weapon is %, it will be able to gain 3percent of its previous attack damage every time it is upgraded. The cost of upgrading an item is determined by the item's level. The cost rises with item's level. Components Upgrade components are items that can be inserted into armor, weapons and trinkets to give an extra stat bo