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World of Warcraft Upgrades and Item Upgrading Upgrades can boost the value of certain numeric stats 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 increase 3% of its previous damage for each time it is upgraded. The cost of upgrading an item is determined by the item's level. The cost increases as the item level increases. Components Upgrade components can be added to trinkets, weapons and armor in order to provide them with a boost in stats or an extra ef