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The Item Upgrader in World of Warcraft The War Within introduced Valorstones, and Harbinger Crests as two currencies to upgrade equipment. They can be traded with the NPCs for upgraders of items Cuzolth and Vaskarn. Each item may be upgraded up to the maximum level once for a slot. Upgrades to that slot will be cheaper following. The pity system, introduced in The War Within, also reduces the extreme variance in upgrades. Upgrades In gaming upgrades are components that enhance performance