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World of Warcraft Item Upgrades Item upgrades are a way to boost the stats of an item. Depending on the upgrade type it can boost an item's Mark Level or Rarity, and also boost other stats. Upgrades to gear in The War Within requires a specified number of Flightstones and Crests Each item has an upgrade track. Each upgrade increases the cost of the following one by a set amount. Item Level The value of an item's base stats increases when it is upgraded. This value is the sum of an item's upgraded perks (attack magic attack and defense). Upgrading items ca