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World of Warcraft Item Upgrades Upgrades to items can be used to increase the stats of a particular item. Depending on the type of upgrade you choose, it may increase the rarity of an item or mark Level, and also boost other stats. Upgrades to gear in The War Within requires a specified number of Flightstones and Crests and each item has an upgrade track. Each upgrade increases the cost of the next item by a certain amount. Item Level The value of an item's stats base increase when it is upgraded. This is the sum of all of an item's upgraded pe