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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 at the s NPCs Cuzolth and Vaskarn. Each item can be upgraded to its maximum level only once for one slot. Upgrades to the slot are cheaper following. The pity system, which was introduced in The War Within, also reduces the extreme variance in upgrades. Upgrades Upgrades are components that improve performance or add new functionality. Upgrades can b