Board Thread:General Discussion/@comment-27079851-20161207035158/@comment-24304025-20170426160518

It seems to have been off the table already, but I still like the theory that Black is Blue's serum version.

The Black Fairy was shown not to be vulnerable to Zelena's magic in a scene that looks a lot like Hyde being hit by magic and suffering no apparent damage. It would actually be nice if the Serum theme from S5 finale and the entire season 6 (with EQ) has a connection to the Black Fairy theme, that apparently came out of nowhere