Let me start off by saying that this is far and away the hardest Dead Ghost to get in the Destiny Beta. You will probably get frustrated. To get this Ghost, you must glitch out of the map. This REQUIRES another person on your Fireteam. Additionally, this Dead Ghost doesn’t appear to unlock any Grimoire rewards, so I can’t say for certain if it counts “legitimately.” But it’s a Ghost, in the Beta, and therefore you should get it.

To get out of the map, I highly recommend watching this video. Follow its instructions exactly to get into the King’s Watch!

There is a nice clip later on in the video that shows how to find the Dead Ghost – if my explanation following isn’t clear enough, watch that!

Credit to Team Lag for the video!

Moving on, the Dead Ghost isn’t super difficult to find if you follow these instructions. When you get into the King’s Watch, return to the blocked doorway, and proceed as follows. First, obviously wave to your friend who helped revive you through the ceiling as a matter of common courtesy.

Next, proceed around the corner toward the lit windows.

After that, you will find a large ruined mess hall, you’ll want to sprint down it, past the two level 20 Dregs, and hang a left at the end of the hallway.

That will take you up a small staircase, following which you should hang a very sharp right and head for the orangish-yellow hallway. There are tons of enemies in this intermediate room, so run quickly!

You will then reach a large, open room with a central pillar. Up and to the left is a hole in the upper level walkway, jump up there before you get killed.

Once you’re on that upper walkway, turn right and you’ll find the Dead Ghost at the end of the hallway.