The revised version.
TENEBROMANCY [-4]
Description:You've learned to wield shadow magic, a dark reflection of normal magic. Contrary to popular belief, it isn't evil. It's dark. It's reflective. It isn't particularly nice. But then, neither is regular magic.
Sponsor:The collective ur-intellect composed of the world's billions of shadows.
Agenda:Shadows aren't really clever enough to have an agenda, but they'd like it if the sun went out, or was permanently eclipsed. Destroying sources of light is generally enough for them. They also like it when you kill photomancers and Summerfae.
Evocation:Rather obviously, shadows. Besides manifesting corporeal shadows, you also manipulate cold, gravity, reflections, and mirrors.
Thaumaturgy: Tenebromantic rituals can obscure things, conjure objects out of shadow-matter, summon creatures of darkness, scry through shadows, teleport through shadows, and steal people's shadows.
Evothaum:You can use any ritual you can cast with Tenebromancy at Evocation's speed and methods.
Extra Benefits: You learn to reflect attacks off bulwarks of darkness- if you successfully defend against an attack with an Evocation block, you may sacrifice your next action to turn that defense into an automatically successful attack, using the block strength as an attack roll, and the strength of the attack as Weapon rating.