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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 boost extra bonuses, such as PvE damage and crit chance. If the template for upgrading a weapon is %, it will increase 3percent of its previous damage for each time it is upgraded. The cost of upgrading an item is determined by the item's level. The cost increases as the item's level increases. Components Upgrade components are items that can be inserted into