Drawlloween 2017 Day 19 is:

NIGHTMARE NOMADS

So, nightmares, dreams, I was wanting to put noted dream theory pioneers Sigmund Freud and his protege, Karl Jung in there (since the plural of the prompt suggested more than one) and the goto antagonist for nightmare horror is, of course, Nightmare on Elm Street’s own Freddy Krueger. Making Freud into Fred was a given, but what to do with Karl? I couldn’t even think of a second nightmare character as well known. So I ended up going with Dream, or Morpheus, or The Sandman from Neil Gaiman’s celebrated comic and making the whole thing into kind of a movie poster in order to explain everything (not the sign of a good joke, when you have to spell everything out to be sure everyone gets it, I know, but …)