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World of Warcraft Upgrades and Item Upgrading Upgrades boost the value of certain numeric stats on weapons, armor and rings. Upgrades also increase bonuses such as crit chance and PvE Damage. If the template for upgrading a weapon is in %, the weapon will gain an additional 3% of the previous attack damage every time it's upgraded. The cost for upgrading items increases when they reach the current level of the item. The cost increases as the item's level increases. Components Upgrade components can be added to tri