What is the "Ghost Door"?

The ghost door is a door that appears randomly in (at least as of documentation) our personal server, sometimes it’s locked and sometimes it’s not. When unlocked, the interior is a dark, confined, gray concrete lined maze, occasionally some items will show up in it. Have you seen this door? Please contatc us!!!

WE ARE ON THE CASE!!!!

this is what the Ghost Door llooks like (recreation), very simple but stands out cuz its not colored!! interior seems to be random but is always a maze, unsure...