WoW Upgrades - The Item Upgrader
Upgrades give you boosts in certain statistics. Each upgrade increases the level of an item by 3. A random additional substat is also added to every upgrade.
Upgraded gear generally sees greater value for trade as long as it meets low requirements (like the FB shield of the sorc) or a very high stat variation (like eth titan weapons). Upgrades are less important for those with lower requirements because of the requirement to roll an exact version.
Recycle Points
The upgrader for items allows players to upgrade their gear to a higher item level by providing the appropriate currency to the NPC. Upgrades can be applied to any kind of armor or weapon. The item used to upgrade the item will be consumed and cannot be used again. Upgrades can be used to create Enchantments.

The upgrader is located in all major cities and is accessible at any time to upgrade your equipment. It is recommended that you visit the upgrader every few weeks to ensure that your equipment is up to date.
Upgrades can cost more based on the item level, however they'll always be cheaper than purchasing new gear. For instance, upgrading a Benthic chest to 385 levels will cost 20 recycle points, while purchasing the same item from another player will costs 105.
Valorstones
Upgrades are items that can be used for tools, armor, weapon, and accessory upgrades. They can be bought by players through NPCs who sell upgrades for items in exchange for different currencies, and can also be found in random treasure lists. Once an upgrade is purchased it can be applied to any weapon, tool, or armor with the help of button, which will show an image of the item when it is upgraded if the player has sufficient materials.
Upgrade costs vary depending on the slot for the item and the current level of the item. For example weapons cost more than bracers, or gloves. item upgrading and a few crests, with certain upgrades offering discounts to reduce the cost of the Flightstones or the crests used. Once an item is upgraded to a certain level it can be re-downgraded and sold to the upgrader at a lower price.
Upgraders for items are available in a variety of locations on the main island as well as some outposts. The NPCs offer both an upgrade coupon and a chance to obtain a new recipe. The upgrade discount increases depending on the amount of items being upgraded. It can also be boosted by having players complete some specific achievements or complete quests.
In contrast to Cromwell in Baldur's Gate II there is no upgrader for items at the start of Icewind Dale. The NPCs who can facilitate upgrades are available only through a variety of methods. This is both a benefit as well as a disadvantage.
In Season 3, many new features have been added to the upgrade system. After an upgrade has been completed to a certain level of item for an armor slot upgrading other items to the same level, will cost less. This is regardless of whether the items are from a different set of gear.
The amount of Valorstones required for upgrades is decreased, and the discount is affixed to all accounts. The amount of Harbinger Crests required to upgrade is reduced as well, but is only available once certain milestones are reached.
Crests
Players have several options when it comes to upgrading their gear in WoW. They can make use of Flightstones, which are a common upgrade currency that is available to everyone players, or crests, which are more specific and consumed during upgrades at specific item levels. Crests are the main component of the Dragonflight gear progression system that was introduced in 10.1 and are available in 4 ranks.
First, you must be aware that Crests are only available to equipment that is of a particular rank. Each rank comes with an upgrade path that is different. The simplest and easiest upgrade costs 15 crests. The most complicated upgrade requires up to 20 crests, based on the kind of equipment being upgraded.
Players can earn crests by finishing content at the appropriate level, which involves walking around and engaging in outdoor activities for gear of lower tiers, dungeons or raids of any difficulty for higher-tier items or Mythic+ dungeons or heroic raid bosses to obtain endgame gear. Crests can be exchanged at an upgrader NPC, like Cuzolth in Dornogal or Vaskarn in Valdrakken to obtain the appropriate upgrade pathways and steps.
The new currency system isn't difficult to use, however it brings some changes to the process of upgrading. When a piece of equipment has reached the highest level of upgrade for any rank (Explorer or Adventurer), it will no longer require Flightstones. This change lets players upgrade their gear to the highest possible ilvl for all their characters rather than relying on seasonal loot.
Another important modification is that crests have one usage and it's crucial to make use of them in a responsible manner. It is best to use your Whelpling-rank crests on the highest-quality gear you can find and save Drake and Wyrm Crests for the next round of upgrades. This is particularly relevant for items like trinkets and rings that take up multiple slots. The discount for the entire account is only applicable when all the slots on the character are filled with top-quality equipment.