https://output.jsbin.com/zetuviniba/
https://helms-rao-2.mdwrite.ne....t/the-most-effective
https://yamcode.com/why-we-why....-we-item-upgrading-a
The Item Upgrader in World of Warcraft The War Within introduced two gear upgrade currencies: Valorstones and Harbinger Crests. These currencies can be traded at the NPCs of s Cuzolth and Vaskarn. Each item can be upgraded to its maximum level for a given slot at a time. Upgrades to that slot will be cheaper afterward. Additionally, the pity system introduced with The War Within