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Keywords are:  'brew affinity'

Some spell components have an affinity for a certain spell and are more
likely to produce that spell when used for brewing potions. Others
have affinity for entire groups of spells. You can see what affinities
a spell component has if you know the 'reagent lore' skill, and certain
other skills such as 'infuse element'.

The known affinity groups are:

fire            (mage and cleric fire spells)
ice             (mage and druid ice spells)
lightning       (mage lightning spells)
illusion        (mage illusions spells)
healing         (cleric healing spells)
divine aid      (cleric divine aid spells)
know evil       (cleric alignment spells)
curse           (cleric curses and curse defenses)
alteration      (druid and generic physical spells)
blood           (necromancer blood spells and cleric poison defenses)
force fields    (mage force field spells)
shadow          (mage and necromancer shadow magic)
torment         (cleric unusual curses)