https://knowles-hunt-2.federat....edjournals.com/why-y
Item Upgrade in World of Warcraft Item Upgrade is a method that allows players to upgrade their armor, weapons and trinkets over what they could acquire from Mists of Pandaria or Warlords of Draenor. It requires crests and currency and is available at any NPC that upgrades items. Items with high requirements typically see increased value following upgrading (eth titans for instance) whereas items with inherently low requirements typically have less value as they can be rolled perfect regardless