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World of Warcraft Upgrades and Item Upgrading Upgrades can increase the value of armors, weapons and rings. Upgrades also boost bonuses like crit chance and PvE Damage. For instance, a weapon with the upgrade template ending in % will take on 3damage to attack each time it upgrades (relative to its previous value). Item upgrading costs crests and the item's current level. The cost increases as the item's level increases. Components Upgrade components are items that can be put into armor, weapons, and trinkets