User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-95.115.250.45-20150923135810/@comment-24834479-20150923234335

Loyalaty is a quality that Lucifer admires, but would you really care if a spider remained loyal to you? That's how Lucifer views humans and demons, as bugs.

It is unknown how the mark and the blade were connected. Maybe we'll explain some this season.