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World of Warcraft Upgrades and Item Upgrading Upgrades can boost the value of armors, weapons and rings. Upgrades can also boost bonuses like crit chance and PvE Damage. If the weapon's upgrade template ends in %, it will be able to gain 3% of its previous damage every time it is upgraded. The cost of upgrading an item increases as it reaches the item's current level. The cost increases with item's level. Components Upgrade components are items that can be inserted into armor, weapons, and trinkets to