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World of Warcraft Item Upgrades Item upgrades can be used to boost the stats of an item. Based on the type of upgrade it can boost an item's Mark Level or Rarity and boost additional stats. Upgrading gear in The War Within requires a set number of Flightstones and Crests and each item has an upgrade track. Each upgrade increases the cost of the next one by a specific amount. Item Level When an item gets upgraded, its base stats are increased in value. This value is the total of all its upgraded benefits (attack magic attack, attack defense). Upgrade