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World of Warcraft Item Upgrades Upgrades to items can be used to boost the stats of an item. Depending on the type of upgrade you choose, it may increase the rarity of an item, or its Mark Level and boost additional stats. Upgrades to equipment 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 one by a specific amount. Item Level When an i