Spellcraft

Ability Type

Skill

Groups

Balanx Basics, Balanx Default, Giant Extras

Help File

spellcraft
SPELLCRAFT
An optional skill for the mage and mage reclasses is spellcraft.  Mages who
choose to undertake the skill of spellcraft spend long hours researching the
finer points of spell casting and power control.  The result of these
extensive studies allows a mage to strengthen the power of his casting, most
evident in his damage causing spells.  Another benefit of the spellcraft
skill is that a mage learns the efficient use of mana during his practice of
casting.

More explicitly, spellcraft refunds the mana cost if you fail to cast the spell. Take it.