Importance of The Black Cloak

The Black Cloak represents evil, but it also a symbol of a drug. Like drugs, the Black Cloak promises to make people feel better or accomplish things that people do not think they can accomplish on their own. People do feel better at first. However, over time, drugs destroy people's bodies and minds and may even lead them to do bad things just to sustain their habit.

This is what happens to Thorne. He needs more children more often and will do anything to get them. In the meantime, his dependence on the Black Cloak (the drug) is destroying his body.