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World of Warcraft Upgrades and Item Upgrading Upgrades can increase the value of armors, weapons and rings. They also boost extra bonuses like damage from PvE and crit chance. For instance an item with the upgrade template that ends in % will gain an attack damage of 3% each time it upgrades (relative to its previous value). Item upgrading costs crests and the item's current level. The cost increases with item's level. Components Upgrade components can be incorporated into weapons,