Greater Spell-Lore (3.5e Feat)
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Greater Spell-Lore [General]
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Prerequisite: Ability to cast 1st level arcane spells, Master of Spellcasting
Benefit: Once per encounter, you can prevent a Critical Spell Failure by making a will save (DC 10+ the Spell Level). Sucess indicates that you suffer no ill effects from the Critical Spell Failure (although the spell still fails), while failure means you suffer the Critical Spell Failure as normal.
Special: This feat may only be used when using the Spellcasting variant.