This permits the wizard to call to mind one spell of 1st to 6th level from one of the caster's personal spellbooks, provided the appropriate spellbook is within one mile of the wizard. The spell must be one that the caster knows, as explained in the Player's Handbook. The spell cannot be called from a scroll or another wizard's spellbook. Only one spell can be called per casting of the penultimate cogitation. The called spell can be cast on any succeeding round. A 10% chance exists that the called spell will be magically erased from the wizard's spellbook.
Notes: Uncommon or rare spell (WoG).