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World of Warcraft Item Upgrades Upgrades to items can be used to boost the stats of a particular item. Depending on the type of upgrade you choose, it can increase an item's Rarity or Mark Level and increase other stats. Upgrading gear in The War Within requires a set number of Flightstones and Crests, and each item comes with an upgrade track. Each upgrade increases the price of the next item by a specific amount. Item Level The value of an item's basic stats increase when it is upgraded. This