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World of Warcraft Item Upgrades Upgrades to items can be used to improve the stats of an item. Based on the type of upgrade, it can increase the rarity of an item or mark Level and boost additional stats. to equipment in The War Within requires a specified number of Flightstones and Crests and each item comes with an upgrade track. Each upgrade increases the price of the next item by a certain amount. Item Level The value of an item's base stats increases when it is upgraded. This value is