https://posteezy.com/advanced-guide-item-upgrades
Item Upgrade in World of Warcraft Item upgrade is a system that allows players to increase the level of their weapons, armor and trinkets beyond the level they can get from specific Mists of Pandaria and Warlords of Draenor sources. It requires crests and currency and is available at any NPC who upgrades items. Items with high requirements generally have higher value when upgraded (eth titans, for instance) whereas items with inherently low requirements typically have less value as they can be perfect rolled regardless of the upgrade. R