One of your parents was a gifted spellcaster who not only used metamagic often, but developed many magical items and perhaps even a new spell or two—and you have inherited a fragment of this greatness. Benefit: Pick one spell when you choose this trait. When you apply metamagic feats to this spell, treat its actual level as 1 lower for determining the spell’s final adjusted level. | Editor's Note
Magical Lineage was never intended as a way for you to actually lower a spell's level. It was put in to allow you to reduce the increase from a metamagic feat. [Source] |