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World of Warcraft Upgrades Upgrades are parts that can be put in equipment to give bonus effects. Upgrades can include anything from stat boosts to increased proc chance of amazing equip effects to stat boosts. The item upgrade system operates a little differently than you are used to from other MMORPGs. This guide will explain the basics and provide some tricks and tips. Rerolling By visiting an item upgrader an item upgrader, players can upgrade items such as trinkets, weapons, and armor