You are unequaled at the casting of one particular spell.
Prerequisites: Spellcraft 15 ranks, at least three metamagic feats.
Benefit: Pick one spell which you have the ability to cast. Whenever you cast that spell you may apply any 1 metamagic feat you have to that spell without affecting its level or casting time, as long as the total modified level of the spell does not use a spell slot above what you can usally cast -5. In addition, if you have other feats which allow you to apply a set numerical bonus to any aspect of this spell (such as Spell Focus, Spell Penetration, Weapon Focus [ray], and so on), double the base bonus granted by that feat when applied to this spell.
Essentia [Locked]: You reduce the Penalty to the Spell Slot level by -1 / Essentia (minimum 0)