Let's talk about metamagic effect, everyone.
From PgtF, pages 62-63:
Metamagic Effect (Su):
Does it apply to just spells, or all magical effects? There seems to have been an assumption in the past that the ability applies to all magical effects; however, as commentators have recently pointed out, it merely restricts its operation to 'spell effects'. It then proceeds to assume players will use it on spells.
So, let discussion begin: what is a 'spell effect', and just what does the incantatrix's ability let her do?