Optional Crafting Reagents Guide
Optional Reagents are a new feature in Shadowlands, allowing players to customize the equipment they create.
Introduction
With Optional Reagents, you will increase the item level of the crafted item, while also increasing the level required to equip the item. This is especially useful while leveling up or gearing alts.
You will be able to specify which two of the four secondary stats you want the item to give bonuses to, allowing you to customize your character's power. However, you cannot choose to boost the same secondary stat more than once.
Some recipes also come with bonus effects that provide utility.

All crafting Professions have access to creating Optional Reagents, and Optional Reagents will only apply to armor and weapon recipes at the start of Shadowlands.
Optional Reagent Slots
Up to 3 Optional Reagents slots are available for each crafted piece of armor. You can fill none, some, or all Optional Reagent slots when you craft an item.
Optional Reagent Slot 1
The first slot allows you to specify the first Secondary Stat on your crafted piece of gear.
You can choose between Haste, Critical Strike, Mastery, and Versatility.
Missive of Haste — Ensures that the crafted weapon or piece of armor will increase the wearer's Haste.
Missive of Critical Strike — Ensures that the crafted weapon or piece of armor will increase the wearer's Critical Strike.
Missive of Mastery — Ensures that the crafted weapon or piece of armor will increase the wearer's Mastery.
Missive of Versatility — Ensures that crafted weapon or piece of armor will increase the wearer's Versatility.
The very same items are also required when you choose your desired stats while crafting Legendary Armor in Shadowlands.
Optional Reagent Slot 2
The second slot allows you to specify the second Secondary Stat on your crafted piece of gear.
You can again pick between Haste, Critical Strike, Mastery, and Versatility, but you will not be able to choose the same Secondary Stat you picked for the first slot.
You will need the same items as outlined above to choose your desired Secondary Stat.
Missive of Haste — Ensures that the crafted weapon or piece of armor will increase the wearer's Haste.
Missive of Critical Strike — Ensures that the crafted weapon or piece of armor will increase the wearer's Critical Strike.
Missive of Mastery — Ensures that the crafted weapon or piece of armor will increase the wearer's Mastery.
Missive of Versatility — Ensures that crafted weapon or piece of armor will increase the wearer's Versatility.
Optional Reagent Slot 3
The final and third slot allows you to increase the item level of crafted gear.
The following Optional Reagents are required to increase the item level and set the Required Level to 50, 55, and 60. The reduced level requirement allows you to wear crafted gear on alts during leveling.
Novice Crafter's Mark — Set the item level to 87 and the Required Level to 50.
Crafter's Mark I — Set the item level to 117 and the Required Level to 55.
Crafter's Mark II — Set the item level to 168 and the Required Level to 60.
Optional Reagent Bonus Slot
Certain recipes will allow for bonus effects, such as increasing your flask or food buff durations.
Alchemist's Pouch (Alchemy) — Increases the duration of Flask effects.
Reinforced Girdle (Blacksmithing) — Allows the wearer to retain their Well Fed buff when slain in an Arena or Battleground.
Loosened Belt (Leatherworking) — Increases the duration of Well Fed effects.
Necrostatic Micro Capacitor (Engineering) — Increases the wearer's Primary Stat for completing World Quests.
Hydrodynamic Accelerators (Engineering) — Increases the wearer's swim speed.
Luxurious Feather — Greatly reduces the damage the wearer takes from falling.
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