https://birchcave5.werite.net/....a-guide-to-item-upgr
https://cobb-lim.mdwrite.net/t....he-no-1-question-tha
World of Warcraft Item Upgrades Upgrades to items can be used to increase the stats of an item. Based on the type of upgrade you choose, it can increase the rarity of an item or mark Level and increase other stats. Upgrades to equipment in The War Within requires a certain number of Flightstones and Crests, and each item comes with an upgrade track. Each upgrade increases the cost of the next one by a cert