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The Item Upgrader in World of Warcraft The War Within introduced Valorstones, and Harbinger Crests as two currencies to upgrade gear. They can be traded at the NPCs of item upgraders Cuzolth and Vaskarn. Each item can be upgraded to the maximum level once for a slot. Upgrades to the slot are less expensive afterward. The pity system that was introduced in The War Within, also lowers the extreme upgrade variance. Upgrades In gaming upgrades are the replacements of components that increase performance