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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 increase bonuses such as Crit chance and PvE Damage. For example, a weapon with the upgrade template that ends in % will gain an attack damage of 3% each time it is upgraded (relative to its previous value). Item upgrading costs crests and the item's current level. The cost increases as the level of the item rises. Components Upgrade components can be incorporated into weapons, armor and trinkets in order to give them a s