User blog comment:Nomad27/What was the Black Scripture's goal in using Downfall of Castle & Country?/@comment-70.160.109.135-20150912030506/@comment-70.160.109.135-20150912032946

It's possible the WCI was used on CDL already, and they ran into Shalltear after the mission was complete. There's no reason for "Downfall of Castle & Country" to not be a multiuse WCI, since it's not one of the Twenty.