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World of Warcraft Upgrades and Item Upgrading Upgrades boost the value of certain numeric statistics on armor, weapons and rings. Upgrades also boost bonuses like Crit chance and PvE Damage. If the template for upgrading a weapon is %, it will be able to gain 3% of its previous attack damage every time it's upgraded. The cost of upgrading an item is determined by the item's level. The cost increases with item's level. Components Upgrade components can be incorporated into trinkets, armor, and weapons to provide them with a boost in stats or an extra