The Plane of Shadows has the Enhanced Magic trait, with the effect that:
Spells with the shadow descriptor are enhanced on the Plane of Shadow. Such spells are cast as though they were prepared with the Maximize Spell feat, though they don’t require the higher spell slots.
…but I’m not seeing a lot of spells with the shadow descriptor. It looks like there are two, both from Champions of Ruin.
Is the maximization supposed to apply to more spells than this, or is it just an essentially non-functioning trait?