Your spellcasting gives you an intuitive knowledge of magic.

Prerequisite: You have levels in a spellcasting class that uses Charisma or Wisdom as its key ability score instead of Intelligence.

Benefit: Choose a spellcasting class you have levels in (not counting prestige classes).  Your Spellcraft checks use the ability score associated with your spellcasting in that class instead of Intelligence as its key ability score.  You also get this effect on Knowledge (Arcana) if that class normally gives you arcane spells, or Knowledge (Religion) if that class normally gives you divine spells.  You may make checks in these skills untrained.

Normal: Spellcraft and Knowledge skills use Intelligence as their key ability score.

Special: You may not select this feat more than once.