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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 currencies can be exchanged at the NPCs, Cuzolth and Vaskarn. Each item can be upgraded to the highest level for a given slot once. Then, upgrades to that slot will be less costly. The pity system, which was introduced with The War Within, also lowers the extreme upgrade variance. Upgrades In gaming, upgrades are replacements for components tha