More of an oversight than a bug.
Dark Blast is currently not implemented.
The transporter to theb ridge is also there, but it says "No Entry" when you go up to it. Not an oversight. It's just content that's planned to come.
@coldreactive The "No Entry" part you are correct on, but the Auto Chat is an oversight. They made sure to remove most if not all Dark Blast references but let that remain in there. That's an oversight. It doesn't really matter since it's just Auto Chat but it can leave a lot of new players confused.