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The Item Upgrader in World of Warcraft The War Within introduced two gear upgrade currencies, Valorstones and Harbinger Crests. These currencies can be traded with the NPCs for upgraders of items Cuzolth and Vaskarn. Each item can be upgraded to its maximum level only once for one slot. Upgrades to the slot are cheaper afterward. In addition, the pity system introduced in The War Within lowers extreme upgrade luck variance. Upgrades Upgrades are parts that enhance performance or add new functionality. Upgrades can be bought or earned in a variety of ways, such as