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World of Warcraft Item Upgrades Upgrades to items are a method to boost the stats of an item. Depending on the upgrade type it could increase an item's Mark Level or Rarity, and also boost other stats. Upgrading equipment in The War Within requires a certain number of Flightstones and Crests, and each item comes with an upgrade track. Each upgrade increases the cost of the next item by a specific amount. Item Level The value of an item's stats base increases as it is upgraded. Thi