World of Warcraft - Item Upgrade
The feature of upgrading items allows players to boost the item upgrader kit level for equippable weapons or armor. This boosts the effectiveness of the gear, as well as sometimes adding buffs or rerolling an affix.
It is important to keep in mind that while you can upgrade items your magic and common equipment, it is generally not worth it. Unique and rare equipment can quickly outperform modernized equipment and magic.
Cost
The player must spend gold to upgrade an item. The cost to upgrade an item upgrader is based on the item Upgrading's current status and the type of upgrade. For instance upgrading a weapon is typically be cheaper than upgrading armor, as weapons require lower levels of skill. The amount of Gold required for upgrading an item upgrader mod increases as the item is upgraded.
The upgraded items will also have upgraded stats that will improve its performance in different ways.