Metaspell

 
Prerequisite(s): Ability to cast Arcane spells without preparation (like a Bard or Sorcerer).
 
Benefit: When you gain new spells, you have the option of learning a metamagically-enhanced spell in place of another spell of the appropriate level. This spell takes up a spell-slot appropriate for the normal level of the spell, modified by the metamagic feat used to augment the spell. You do not need to know the base spell nor the metamagic feat used to modify the spell in order to use this feat. Once a metamagically-enhanced spell is learned in this manner, you cannot cast the spell without its metamagic enhancement, though you can augment the spell in standard fashion with additional metamagic feats. A metamagic spell learned in this fashion is cast as if the spellcaster were a Wizard, without increasing the time needed to cast the spell.
 
Source: Mongoose Ultimate Feats