When that character manually closes the door on the western side of the room (#5a), the door on the eastern side (#7) will open. Next, you'll need to send a character into the room with the new door. To open one of the new doors (#7), you'll first have to open the doors they're linked to (#5a) by opening or closing the original linked doors (#5), ideally while your party is standing in the room that previously contained the necrotic fog (#6). Flipping that switch will link two new doors (#7) to two of the other doors (#5a). Opening and closing the first two doors (#5) will open or close the other doors (#5a, #5b), allowing Hexxat to reach the switch for the necrotic fog (#9). While dealing with the necrotic fog, you'll also have to manage several overly-complicated linked doors (#5, #7). With your entire party together, the bone fiends shouldn't pose any problem. If Hexxat can't kill these creatures on her own, then she can either lure them back to your party, or she can run ahead and flip the switch that will turn off the necrotic fog (#9). She'll run into some bone fiends during this time, including one named T'lassus of the Bones (#9). You can use Negative Plane Protection to avoid the level drains, but the damage will probably be so great that you'll have to send Hexxat out on her own.

Living creatures will take damage and get level drained if they try to pass through it, while undead creatures won't have any problems at all. During your second encounter with her (#2a), she'll steal theĮventually, you'll discover a room filled with necrotic fog (#6). She'll attack you every time she spots you, but then she'll disappear once she's taken too much damage. You'll also repeatedly run into Phreya (#2), another one of L's abandoned agents. While you're exploring the tomb, you'll encounter bone fiends (worth 12,000 xp), death tyrants (14,000 xp), greater mummies (8000 xp), and sand golems (14,000 xp). You'll be sent there by L to hunt down a rebellious lich named Korkorran.

Dragon age fog warriors