Like the trophy room, but with NPC's not animals. Wouldn't it be cool if you can behead a certain foe and use his head on a pike to decorate your house? The foe has to have evil karma for you to do it, though.

Delphine's head would be the only head on my wall.

Walking in to the Trophy Room, only to be greeted by Nazeem's head. Being able to dismount his head and bring it with you to the Cloud District.

If you want your head to smell like dead flesh.