I think it will be very interesting to see how Hades is connected to the Dark Curse and to The Dark One. I bet it is all connected. Like maybe by creating the dark curse, the repercussions were creating this “dark evil darkness.” Once this is revealed, perhaps we will go back to the Lily story line and they will tie that up going into next season. I still think we are going to get the true origin story behind how the darkness officially came to be, and not just how Merlin tried to control it and who the first person to inhabit it was (Nimue). How did it even exist? I’m guessing Hades and I’m guessing it has something to do with the Dark Curse that he created, that Rumple later retrieved with the Queens of Darkness.