I’ve just tried creating a new Druid Wild format deck and the game is showing me that Raven Idol is banned! I’ve heard from others that this is most likely a bug. If this is true, then I’d like to make a formal bug report.
It just doesn’t make any sense why on earth this card would be banned! It’s been there for ages. It seems that at some point it was moved to the Core set but that shouldn’t be a reason for it to be banned.