You choose one spell known to you that becomes permanently modifi ed as though affected by Enlarge Spell, Extend Spell, Still Spell, or Silent Spell. The spell's level does not change, nor does the choice of spell and modifi cation once chosen. As you go up in level, you can choose the same spell to be modifi ed in different ways with multiple spell secrets (either from additional uses of this feat or through the spell secret class ability). You do not need to have the metamagic feat that you apply to the spell.