User blog comment:Shikifan/12M Downloads Campaign: the mysterious Servant/@comment-33940255-20180225165157/@comment-30314236-20180225193136

Mmm... A new class would explain why the last card was hidden with an interrogation, but since they added a new class just a few months ago, isn't that a bit overkill?

Mooncancer sounds really plausible, though, since there's no official artwork for that class...