Is "Umbral Strike; necromancy (shadow)" a Misprint?

[SpiderTries]

In the Book of Shadows (pg. 16), the Umbral Strike spell's details read "School necromancy (shadow) [darkness]". I've found no other spell with Shadow as a subschool of Necromancy, only of Illusion. As "Book of Shadows" is a rather minor Player Companion, I've not seen any mention of this in FAQs/errata.

Is this supposed to be...

"necromancy [shadow, darkness]"

"illusion (shadow) [darkness]"

exactly as it is, with "Shadow" added to Necromancy's sparse subschools

[Azothath]

lol, it is what it is.
The "(shadow)" is there so abilities that require that term can be met.
AFAIK there's no Necromancy subschool shadow and adding the Illusion school name would obfuscate the spell's school so you just get the subschool name (tacked on). Again, the Game is a Work of Art and not a technical manual or science textbook.

[Mysterious Stranger]

The Shadow in Umbral strike is probably a descriptor instead of the shadows school. There are in fact several other necromancy spells that also have the shadow descriptor. Touch of Blindness, Masochistic Shadow, Shadow Attack, and Umbral Infusion are all necromancy that has Shadow listed in the school.