User blog comment:Nomad27/What was the Black Scripture's goal in using Downfall of Castle & Country?/@comment-33177490-20150912025143/@comment-26836039-20150912051149

There could be several reasons:

1. She's a descendant of the Six Great Gods and inherited the capability to use WCI.

2. She has the same ability as Nfirea who can use any special items as fellow NW characters.

3. She's one of the few NW who managed to learn how to use WCI.

Personally I'll go for no. 2