Board Thread:Spoilers!/@comment-4725053-20160512134817/@comment-24674051-20160513171431

as for not bringing Robin back, let's seperate story from acting.

Sean has made it known that he will likely not return to the show after Robin's death. which is sad, but understandable. But that is acting. He will move on to other projects (just as Meghan Ory, Jamie Dornan, Sebastian Stan, David Anders, Raphael Sbarge, and the other recurring characters have before him.)

The story aspect, which does not depend on actors, could very well have the crystal be able to both End and Restore destroyed souls. Look at what has been done with the Graphic Novels. You can add to stories, and actually do so more creatively, when you don't have to rely on actors or CGI. and other series have added to the canon of their shows though use of novels.

so the theory of the Olympian crystal is not as far-fetched as it might seem, though we may well never see anything of it on the show.