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World of Warcraft - Item Upgrading Players can upgrade their armor, weapons and trinkets with the help of appropriate currency and items at an upgrader NPC. The item upgrader NPC requires the appropriate currency and items. For instance for a weapon, one that is bound to the default upgrade template for a weapon can gain an additional 3% of attack damage each time it is upgraded. The % value it gains is based on the stat value. Recycled I