I loved this part of your post:

"black hole special effect. It literally sucks the light out of the rooms as it moves. Somehow you just know that if it touches you, you're dead. And not physically dead. You'll lose your ... soul? identity? whatever you like about yourself, whatever defines you, all meaning, would be simply destroyed if it catches up with you. And you feel this horrible malevolence, as if it's coming for you personally and enjoying every minute of the ensuing chase."

It totally reminds me of one of the most terrifying dreams I've ever had. There was this sort of black hole in our basement, locked deep behind layers of doors or something. It wasn't quite sentient, but it was still malevolent. I knew that it would one day destroy the universe. If you got close to it, it would destroy you too.