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The Item Upgrader in World of Warcraft The War Within introduced Valorstones, and Harbinger Crests as two currencies for upgrading equipment. These can be traded at the item upgraders NPCs Cuzolth and Vaskarn. Each item may be upgraded to its maximum level once for one slot. Afterward upgrades to the slot will be less expensive. Additionally the pity system introduced in The War Within lowers extreme upgrade luck variance. Upgrades Upgrades are parts that enhance performance or add new functionality. They can be pu