Alter Aeon Online Help

Keywords are:  'skill reagent lore affinity'

Skill: reagent lore             Lvl 19  Any  (28%)
                                (helpful)   Requires: bottling
                                Group: Decantation
                                Profession

Usage:
brew check

The reagent lore skills allows you to identify what affinities an identified
spell component may have by looking at it. You can also use 'brew check'
to list all spell components, herbs and food you are carrying.

A spell component with an affinity for a particular spell or spell group has
a greater chance adding that that spell or a spell from that group to a
brewed potion. They can also be used to make ink when scribing scrolls for
a particular spell, and making more potent unguents. Spell components with
elemental affinities are also used when assembling grenades, for adding
resistances to raised undead creatures, certain enchantments and a variety
of other purposes.