The Item Upgrader in World of Warcraft
The War Within introduced Valorstones, and Harbinger Crests as two currencies for upgrading equipment. They can be traded at the item upgraders NPCs Cuzolth and Vaskarn.
Each item can be upgraded to the highest level for a particular slot once. Upgrades to that slot are then cheaper afterward. The pity system, introduced with The War Within, also reduces the extreme variance in upgrades.
Upgrades
Upgrades are components that improve performance or add new functionality. Upgrades can be earned or purchased in a variety of ways like in-game events or cash shop items.
Unlike upgrade item , which can be added to any item, upgrades are attached to specific items and are only used on those items. A weapon that is already equipped will not be upgraded. Some items can be upgraded more than once and provide a greater benefit to the player.
Upgrades are a relatively new mechanic that was introduced in patch 4.1.0. The upgrade system allows players to make additional improvements to their equipment in order to increase its power. It could range from merely strength increases to significant damage and defense increases. The upgrades are separated into tracks, and each track has a limit on the amount of upgrade that can be done. These limits are designed to stop players from scavenging low-keystone dungeons and upgrading their gear all the way up.
Weapons, armor and consumables are all upgradeable items. Most gear is already upgraded as it drops however, a few items (such as Ornn's gear, or the baby Dracolich pet) aren't upgradeable. Gear can be upgraded by purchasing an upgrade recipe from the vendor and then combining it with the item in the appropriate upgrade slot. One can check the number of upgrades a piece of equipment has by looking at it's inventory icon, or by searching for the item in the shop.
There are two main disadvantages to the upgrade system. First, it's sometimes difficult to identify what items are eligible for upgrade because upgrade vendors may not display them all. The upgrade textures are created over the model which may hide enchantment info as well as other details.
The other drawback is that upgrades can be costly. Each step up a gear's upgrade level will cost a certain amount of Valorstones and crests, based on the slot of the item and the level of the item. Weapons typically require more crests and Valorstones to upgrade than bracers or gloves for instance. There are however, some cash shop items that can lower the cost of upgrading.
Recycle
In the wake of an increasing awareness of how single-use products and wasteful habits contribute to environmental degradation, many people are changing their shopping habits. Some people buy high-quality items that will last longer, or recycle their old gadgets in search of an answer. Some consumers are focusing on recycled products and seek the highest recycled content when making purchases. This trend is likely to reduce the amount of energy required to produce and extract new materials, and create a more sustainable environment.
It is now easier than ever before to find recycling. Many products, including furniture and paper, contain recycled materials. This means they're made from reused or discarded material, and it's easy to purchase recycled items online or in stores. In addition to preserving the environment and reducing waste, these products are usually more affordable than the alternatives.
When an item is leveled up it will be rewarded with additional bonuses along with its improved stat. The bonuses are based on the item's tier and may be of various types. The ones who have higher tiers will get more bonuses than those who have lower levels.
As the world economy shifts from extracting resources to recycling and reusing, more companies are making promises to create greener products. Many of them are insisting on using recycled materials and providing incentives to customers to recycle their products. As the demand for sustainable products increases it is likely that we will see more recycled items in shops and on the shelves.

Rerolls
In Genshin Impact - or any gacha game for that matter Rerolling is a crucial tool. It lets players re-try their chances of obtaining an item or character that they either prefer due to aesthetic reasons or because they feel that it will fit on their team.
Rerolls function by allowing players to refresh the items available in the current game in exchange for a small amount of materials. Prices of these weapons rise as the number of rerolls increases however some items might not be available (for example, characters who only use ranged weaponry will not be able to access the melee weapon).
As an item increases in stats, it enters the Staple Pool where it gains additional bonuses. item upgrades are based on type of item that it is. For example, an upgrade that boosts a weapon's main stat will also increase its additional stats. The additional stats can also alter if the item is modified.
When a player is in enough stamina to complete a reroll they can press a button with circular arrows to swap their existing item for another one. The new item will come with the same level, but with a different set of extra bonuses, depending on whether the previous item was a sword, gun, watch or book.
Rerolling an item doesn't alter its current levels of bonus, but players may be required to meet minimum stat requirements for its special ability. It's not easy to get an item that has the bonus you want however this allows them to try another option in future without spending any additional resources.
Upgrading an item won't only increase its bonuses, it can also give the item a tier boost, meaning that it will be guaranteed to gain a certain amount of bonus stats if upgraded in the future. This is one of the reasons why it's important to only upgrade gear as far as you can, as once you hit the tier where any further upgrades will not make a huge difference, it's not worth it.
Sets
A set is a collection of items that share a similar property. They are often used in mathematics and can be represented by . Sets possess a variety of important properties, including the commutative and associative properties. These properties are crucial for understanding how sets work and have real-world applications.
In the game the items can be upgraded in sets to unlock additional benefits. For example an armor set pieces may give a boost in the armor's defense while a weapon could provide an extra damage base. These additional stats are applied after the base stat and before flats and percentages. These additional stats are an excellent way to add value.
When an item is upgraded it will replace the previous base stat with the new one. For example an item that had 20 base damage now has 40 base damage. The base armor and upgrade requirements will remain. This is an excellent opportunity to purchase an elite item for an affordable price.
Upgrades to unique items are highly profitable, particularly when they come with an interesting modification. A rare belt with +5 IAS for instance could have a significant impact on a build's power, especially in early hell. It's an excellent way to increase the value of an item by adding an ideal or high-roll.
Item Upgraders differ for unique, set, and rare items. The item will typically be upgraded to its new type once it is upgraded to level 10. A unique upgrade of an armor item that has the highest defense will result in a similar type of base for an elite armor item. This isn't a guarantee, and in certain cases an upgrade may not change the type of item.
It is recommended to upgrade your BiS (Best in Slot) and then move to non-BiS items. This will give the player a solid base to build upon when they are leveling up. They can then concentrate on increasing tiers and gaining additional stats.