World of Warcraft Upgrades and Item Upgrading
Upgrades can increase the value of weapons, armors and rings. They also increase bonuses such as PvE damage and crit chance.

If the template for upgrading a weapon is %, it will increase 3percent of its previous damage for every time it's upgraded.
The cost of upgrading an item is determined by the item's level. The cost increases with the item's level.
Components
Upgrade components are items that can be inserted into armor, weapons, and trinkets to provide an extra stat boost or effect while they're in use. They can be obtained by crafting, buying from vendors trading, or looting. Certain upgrades come with special cosmetic effects.
Upgrade components are only available to devices that have slots. The item must be at least upgraded to blue level before a component can be applied. Unlike other mods, upgrade components can only be used once; they can't be used multiple times or replaced with new upgrades. Infusions and enrichments are a special kind of upgrade component used for non-amulet ascended and legendary equipment, as well as some of the non-ascended back items. Infusions and enrichments can be retrieved by salvaging ascended gear or by completing an elite mission in the Prophecies, Factions and Nightfall campaigns.
An upgrade may be prefixed or a suffix that alters the name of the equipment to which it is used (for examplefor example "Canthan Armor Insignia is changed to Canthan Armor of Minor Vigor). Certain upgrades boost the Mark Rarity or Level of an item, which lets players to create stronger versions of the item using the smallest amount of upgrade crystals than they require to achieve the same level using standard methods.
A boost upgrade is a way to alter the defense or attack properties of a weapon, or armor. Once the player has completed the cutscene and defeated the Crazed Mechanist the upgrades can be made at the Portative Forging Station. These upgrades can be purchased by purchasing them from the cash shop, or by getting them from enemies while upgrading other equipment.
Each upgrade increases the likelihood that a better-quality version of an item will be revealed during the next reset. This gives players the opportunity to upgrade their gear, even if they are unsure what will be improved after an update.
The process of upgrading an item can be costly and it's possible that the item will become obsolete or even break if the upgrade fails. Upgrade Crystals and assist powders are also destroyed when the upgrade fails. This is alleviated by the availability cash shop items that double or even eliminate possibility of failure, as well as some upgrades that provide a bonus when reinserted into an item.
Glyphs
Glyphs are upgrade components that can be placed in special sockets on the Paragon Board. Glyphs boost the power of all nodes within a radius around them, including pre-existing affixes on equipment. Glyphs can be upgraded in numerous ways. We recommend upgrading them as quickly as possible up to 15 levels.
You will often find in the endgame that putting Glyphs is the most effective method to upgrade your equipment. They are the only upgrade component that can be upgraded straight to level 15 and provide a large boost to your power and radius on the Paragon Board, enabling you to reach higher nodes much faster.
Most of the upgrades in the game can be replaced however, Glyphs are only the one upgrade component that can be removed and put back in place without any restrictions. Only legendary equipment can be salvaged and replaced using a Black Lion Salvage Kit.
Each Glyph has a particular range of values that can enhance a stat by, and the value is displayed when you select the Glyph in your inventory. You can decide to replace it with another Glyph of the same rank or a higher rank, which will boost the overall value of the Glyph.
You can find Glyphs in the Black Lion Trading Post, as part of a Gem Store purchase or bundle with certain unlimited-use gathering tools as well as through Faction Crypt raids. Every Faction Crypt has the chance of dropping one of the many Glyphs and there are also a few rare glyphs to be found as drops from any of the four Faction Crypts.
Once you have the desired Glyphs then you have to attach them to your equipment. item upgrading unlocks a bonus which will boost the stats of a specific set of nodes within a radius around the Glyph. Based on the Glyph it could be +40 to one of your primary stats or +25 to two of your secondary stats.
Glyphs boost all nodes connected to them, which is why it is best to place Glyphs in strategic spots on the Graph. This will maximize the impact. For example an Druid should try to place their Glyphs close to their primary damage points, but you should also be sure to place them near the most critical damage nodes as well.
Leveling
The upgrade system for items allows players to boost the power of certain items by adding upgraded components. This is often referred to as "upping". Each upgradeable item comes with a level that determines its final upgraded stats. Upgraded items can be upgraded up to a maximum of ilvl 385. Each item level requires a different amount of components, and the upgrade costs increase as the item gets leveled up.
Some upgrades require a special ingredient to activate. This ingredient is obtained by the completion of Upgrade Recipes. These recipes can be purchased from NPCs or found on the upgrade tab in the crafting table. Each completed Upgrade Recipe yields a number of Technology Points. These points can be used to upgrade the item. Once enough are earned, the upgrade will be claimed and the additional bonuses will be added to the item.
When an individual player upgrade the equipment they have it will be replaced by an item that is new. The same armor can be transformed into a weapon or a shield when upgraded. The new item also has its own set bonus. This could be a drawback because it can cause the item to become more expensive, even if you don't require it.
The upgrades to items can be rerolled if the player has enough reroll tokens to do this. The item will be replaced by an entirely new item that is based on a level 1 base and totally different bonuses. This is useful for certain items, however it's not something that should be repeated often, as it can waste many resources.
Some upgrades can be rerolled multiple times which increases their value and giving players the ability to alter their gear. Dolphin's Gift is a good example, as it provides a buff if the player repeatedly enters or exits the water. This item can be upgraded many times and increases the maximum roll each time by 10 increments. This item is extremely useful in PvP battles, since an item that is properly rolled it can be worth between 20 and 50 times its value without being upgraded.
Requirements
Item upgrading allows players to upgrade the level of their available equipment--armor, weapons, and trinkets over ilvl 385 by offering the appropriate items and currency to an NPC that upgrades items. The upgrade of armor set pieces will also increase the defense base of that piece, while upgrading weapon equipment will increase the base damage as well as the required strength and dexterity to meet the upgraded equipment's requirements.
All items can be upgraded up to five times except for hero gear, which can be upgraded eight times. Each time you upgrade a piece of equipment, it has a chance of failing. The rate of failure increases as you go over the maximum number. Failures will result in the item reverting to its original condition which means that the player has to spend additional materials than if they had stopped upgrading after the maximum amount.
If an item does not upgrade the amount of experience in its growth bar is reset to zero. In addition the item will lose any gained bonuses, including crit chance and attack damage, as well as all other effects that are associated with that effect (for example, increased heal over time or reload speed). However, the player can still continue to use the weapon or armor following the failure.
When an item is upgraded the upgrades are applied from the lowest to highest. This means that the weapon that is upgraded gains a crit chance increase, the increase will be applied prior to any attack damage increases. A new attribute known as Slots is now added to the definition of the item and the value is recomputed each time an upgrade is applied.
The amount of resources required to upgrade an item are dependent on its rarity score and upgrade slot count. The cost of upgrading equipment that is not premium is equal to the value of the base item. For instance an item that is commonplace could have five upgrades at a cost. 25,600 Technology Points and a 4x Quality Improvement Chance--whereas hero grade items will come with a much lower cost for each upgrade.
Premium items could have different upgrade requirements than standard gear. For example they may require less sowels, but they will require more minerals and orons. Whatever the case, players must visit the NPC [Armorthe ] Boboko in Central Flarine with each piece of equipment they wish to upgrade. Each upgrade to equipment requires different amounts of ingredients needed to upgrade, in addition to the cost mentioned above.