According to Constantine, a demon’s power resides in Sara and it’s only a matter of time before she succumbs to it.
Sara is their leader, and she’s not somebody who will be easily stopped if/when she turns on them.
Constantine and the Legends teamed up to try and free the young girl from Mallus, and they were all surprised to discover that young “Emily” was actually Nora, the daughter of Damien Darhk.
Constantine recommended keeping the Legends’ anti-magic gun handy, and the good guys got a clue that six totems will play a part in defeating Mallus, but something tells me they’re going to be in over their heads sooner rather than later.