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World of Warcraft Upgrades Upgrades are parts that can be added to equipment to give it various bonuses. Upgrades can be anything from stat boosts to increased proc chance of amazing effects of equipment to stat boosts. The upgrade system for items works a little differently than you might be used to from other MMORPGs. This guide will go over the basics of how it works as well as some tips and tricks. Rerolling When visiting an upgrader for items, a player can upgrade items like tr