WoW Upgrades - The Item Upgrader
Upgrades can give you boost in certain stats. Each upgrade increases the level of the item by +3. Each upgrade also increases an unspecified substat.

The upgraded gear typically has a more value in trade as long as it meets low requirements (like the FB sorc's shield) or a very high stat variation (like the eth titan weapons). These types of gear get less value from upgrading due to the need to roll for a perfect version.
Recycle Points
The item upgrader allows players to upgrade their gear by giving the currency to an NPC. Upgrades can be applied to any type of armor or weapon. The item used to upgrade the item is discarded and cannot be used again. Upgrades can be applied to the enchantments.
The upgrader is located in all major cities and can be accessed anytime to upgrade your equipment. It is recommended that you visit the upgrader every few weeks, to keep your equipment up-to-date.
Upgrades will cost more, based on the level of the item, however they'll always be cheaper than purchasing new gear. For example upgrading a Benthic chest piece to ilvl 385 will cost 20 recycle points, while purchasing the same item from another player will cost 105.
Valorstones
Upgrades are items that can be used to upgrade weapons and tools, armor and other accessories. They are purchased by players through NPCs who sell upgrades for items in exchange for various currencies, and can also be found in random treasure lists. Once an upgrade has been purchased, it can be applied to any weapon or tool with an The button will display a preview of an item's next upgrade level, if there are enough materials.
The upgrade cost depends on the item slot and the current item level and the weapon's price is higher than gloves or bracers, for instance. Each step costs 15 Flightstones plus a specific number of crests. Some upgrades give a discount on the Flightstones. Once an item has been upgraded to a certain level it is able to be downgraded and sold to the upgrader at a lower price.
Upgraders for items can be found at many locations on the main island and some outposts. The NPCs offer both an upgrade coupon and the possibility of obtaining the latest recipe. The upgrade discount increases as more items are upgraded. It can also be increased by having players complete certain achievements or quests.
Contrary to Cromwell in Baldur's Gate II there is no item upgrader available at the beginning of Icewind Dale. Instead the NPCs that are available to help with upgrades require a variety of means which is both an improvement and a drawback.
In Season 3, several new features were added to the upgrade system. When a player has an upgrade to a certain level for an item in an armor slot, upgrading other items to the same level will be less expensive, even if they are part of another set of gear.
The discount applies to all accounts. The amount of Harbinger Crests needed to upgrade is cut too, but it is only available once certain milestones have been reached.
Crests
Players have a number of options when it comes to upgrading their gear in WoW. Flightstones are an option that is accessible to everyone who wants to upgrade. Crests are more specialized and are used for specific level upgrades for items. Crests are an integral part of the Dragonflight Gear Progression System, which was introduced in version 10.1. They are available in four ranks.
The first thing to remember is that crests are only available for equipment that is that is of a particular rank. Each rank comes with a different upgrade path. item upgrades and simplest upgrade process costs just 15 crests while the most complex can require as much as 20 crests, based on the kind of gear being upgraded.
Players can earn crests through working through tasks at the appropriate level. This could be by doing outdoor activities or taking on dungeons and raids of all difficulty levels to obtain lower-tier gear or Mythicbosses for raids, or dungeons with a heroic difficulty to obtain endgame gear. The crests can then be exchanged with an upgrader for the item such as Cuzolth or Vaskarn in Valdrakken for the appropriate upgrade steps and paths.
The use of these currencies isn't too difficult, but the system introduces some modifications to the upgrade process. Once a piece of gear attains the highest level of upgrade for any rank (Explorer or Adventurer) it is no longer required to purchase Flightstones. This change is intended to allow players to upgrade their equipment to the highest ilvl possible on all their characters instead of relying on seasonal loot.
It's also crucial to choose crests in a wise manner, as they are only used for one purpose. For instance, it's a good idea to use all of your Whelpling-rank crests on the best equipment you have and then keep Drake and Wyrm crests to use for the next set of upgrades you plan on making. upgrade item is particularly applicable to items like trinkets and rings that take up multiple slots. The discount on the account will only be applicable if all the slots on the character are filled with high-quality equipment.