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World of Warcraft Upgrades and Item Upgrading Upgrades boost the value of certain numeric stats on armor, weapons and rings. They also increase bonuses like crit chance and PvE damage. For , a weapon with the upgrade template that ends in % will take on an attack damage of 3% each time it is upgraded (relative to its previous value). The cost of upgrading an item is determined by the item's level. The cost increases with the item's level. Components Upgrade components can be added to weap