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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, such as damage from PvE and crit chance. If the weapon's upgrade template is %, it will increase 3% of its previous attack damage every time it's upgraded. Item upgrading costs crests and the current level of the item. The cost increases as the level of the item rises. Components Upgrade components are items that can be slotted into weapons, armor, and trinkets to provide a stat bonus or e