Board Thread:Arrow discussions/@comment-27700324-20180330170901/@comment-3221148-20180401212804

Ninja72 wrote: Will someone here adress the continiuty error I mentioned? I don't think it was specified that he created the Thanatos Guild AFTER Season 4. He probably gathered loyalists back when he was Ra's al Ghul, you know.

Specifically: "Apparently, my dear old dad decided to recruit some loyalists before Nyssa disbanded the League."

- Thea

In Season 4 while he was working with H.I.V.E. there have already been loyalist assassins of Merlyn working together with ghosts. So, technically we could give the Thanatos Guild retroactive appearances.