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World of Warcraft Upgrades and Item Upgrading Upgrades can boost the value of certain numeric stats on armor, weapons and rings. They also boost extra bonuses such as PvE damage and crit chance. For example, a weapon with the upgrade template ending in % will gain 3damage to attack each time it upgrades (relative to its previous value). The cost of upgrading an item is determined by the item's level. The cost increases with item's level. Components Upgrade components can be a