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