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World of Warcraft Upgrades and Item Upgrading Upgrades increase the value of certain numeric stats on weapons, armor and rings. They also increase bonuses, such as damage from PvE and crit chance. If the template for upgrading a weapon ends in %, it will gain 3% of its previous attack damage every time it's upgraded. The cost for upgrading items increases when they reach the current level of the item. The cost increases with the item's level. Components Upgrade components are items that can be put into armor, weapons, and trinkets in order to provid