Shadow Magic

Feats

Shadow Weave Magic
+1 spell power for enchantment, illusion, and necromancy. -1 caster level for evocation and transmutation. Cannot use light spells, ever.
Pernicious Magic
+4 to spell penetration against weave users, except for evocation and transmutation.
Tenacious Magic
+4 to your dispel DC for all spells excent evocation and transmutation.
Insidious Magic
Attempts to detect magical auras of your spells requires a level check (DC 11 + your caster level) to succeed. Also, there is the confusing text below, which seems to imply that your illusions are not detectable even by divinations that detect them. Could it be true? Does true seeing override it?
Similarly, a Weave user attempting to reveal the effects of one of your spells via a divination spell (such as ''see invisibility'') must make a caster level check to succeed.