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Pokemon World of Warcraft - What is Item Upgrade? Item upgrade is a method that allows players to boost the effectiveness of armor, weapons and trinkets. It also gives players unique effects and special effects. Most upgrades increment stats linearly, for instance a level 20 Muscle Band would give +1 attack and +.5 percent attack speed. The system also has a chance to fail, which will consume all upgrading materials. Glyphs Glyphs are a great way to upgrade the gathering tools and provide bonuses or improvements. They can be bought from the marketpl