a shadow kingdom, which is dark, and people cash shadows when they walk.

I know another kingdom is kinda lame, but a lot of kingdoms don't have active members, so they probably might get scrapped unless they get fixed up. Another thing is a creature that people of the kingdom turn into when they enter kingdom grounds that can can turn into a shadow moving on the ground, then reappear again, the shadow can even go on walls, but not on the outside black part where there is no room. I have more ideas for a kingdom, but I'm just gathering ideas. Anyone else got any ideas?