Huge Door In Canyon Of The Lost

Ok, so I was walking around the canyon collecting keys when I found this...
I don't know what it is, but near the middle button I saw what looked to be a teleporter behind the door. I looked around the forums but found no information on it. Does anyone know what this is?

 

I believe that's the entrance to the as-yet-unreleased Mortal Mountain dungeon.

 

He's right. This is the entrance of the upcoming dungeon of Gavel.

 

Ok, so I guess multiple people know about it?

 

What. How do you know?

 

The Mortal Mountain is listed as a dungeon on the help page, which lists coordinates. The coordinates given for it are basically the coordinates of the door, but the door doesn't do anything--thus, the dungeon is not yet implemented.

 

Oh wow! Didn't know that, thanks for the info ^^

 

By using some time to think and use common sense, yes multiple people know about it since its right next to one of the fastest roads to thesead and a quest is taking place like right in front of it.

Don't take this the wrong way, but the search bar exists for a reason.

 

You know I oftenly go in COTL and I still rarely see this door ? XD

 

I guess then I just haven't explored in a while XD rip