Precocious Apprentice( Complete Arcane, p. 181)
Your master has shown you the basics of a spell beyond the normal limits of your experience and training.
arcane caster level 1st, Spellcasting ability (Int or Cha) 15,
Choose one 2nd-level spell from a school of magic you have access to. You gain an extra 2nd-level spell slot that must be used initially to cast only the chosen spell. Until your level is high enough to allow you to cast 2nd-level spells, you must succeed on a DC 8 caster level check to successfully cast this spell; if you fail, the spell is miscast to no effect. Your caster level with the chosen spell is your normal caster level, even if this level is insufficient to cast the spell under normal circumstances. When you become able to cast 2nd-level spells, you lose the benefit described above but retain the extra 2nd-level spell slot, which you can use to prepare or spontaneously cast a spell of 2nd level or lower as you normally would. Finally, you gain a +2 bonus on all Spellcraft checks.
You can take this feat only as a 1st-level character.