http://arcdog.com/architects/c....rushgame02/activity/
The Item Upgrader in World of Warcraft The War Within introduced two gear upgrade currencies: Valorstones and Harbinger Crests. These currencies can be exchanged at the NPCs who upgrade items, Cuzolth and Vaskarn. Each item can be upgraded to its maximum level for a particular slot once. Upgrades to that slot are then cheaper afterward. The pity system that was introduced with The War Within, also reduces the extreme variance in upgrades. Upgrades In gaming, upgrades are replacements for components that improve performance or pr