Reagent

A reagent (IPA riˈeɪdʒənt or re-ey-gents ) is an item that is required in order to cast a specific spell or use a specific ability. A reagent differs from a tool in that successfully using the ability/spell will consume the reagent. The use of the term comes from chemistry terminology, reactant, and items used in chemical reactions. Blizzard Entertainment adopted the term to extend its use to include spells and some recipes. Reagents are generally not tradeskill or crafting ingredients (except perhaps Alchemy).

Reagents Used by Spells or Abilities
1 This is the base price before any discounts.

Reagent vendors can be found in all major cities and many towns.

Reagents Used by Professions
Some drops from mobs that are materials for tradeskill recipes are also classified as "reagents" by the game. (For example in the auction house.) This is counterintuitive, as such items would more logically be called "trade goods". Examples include Elemental Earth and Ironfeather.

Elemental Drops
There are three tiers of elemental reagents. These are used by all professions for crafting and enchants. They are dropped by elementals of the corresponding type at rates of 2-10%, making them somewhat valuable.

Each tier becomes available off of mobs of progressively higher level. For example, (almost) all fire elementals can drop the lowest level item Elemental Fire. A level 50+ elemental can drop Elemental Fire, Heart of Fire, or Essence of Fire.

2 Approximate values at auction are based on data collected by Allakhazam as of July 2006. Demand for these items will vary on any given server based on local market conditions and as new tradeskill recipes are added to the game.

Other Drops Used by Professions
Note: This table only includes drops that are classified in-game as reagents.