The group begins moving further into the corridor, turning right at the first opportunity. The bloodstains are present in this hall as well.
Just as Nethezar and Eskard reach the intersection, an incorporeal being emerges from the wall to the north. It has a vaguely humanoid shape, but it is black and looks like something out of a nightmare.
You barely make out what sounds like inane babble from the creature before it immediately sinks back into the north wall.
"Was that an allip?" Nethezar wonders aloud, not nearly as shocked as one might expect. Unfortunately, none in the group is able to answer, as you've never heard of such a thing.

[sblock=OOC]I think worthley is the only one that mentioned a specific route (always going right). If that works for you guys, we can proceed that way.
Gah! Nevermind. In the interest of not wasting more time given Ti's internet access, I'm just gonna go with that plan, since you guys don't get very far before getting interrupted.
I'm not rolling initiative yet. The incorporeal undead essentially gets a surprise round, moves out of the wall, and immediately back in.
X marks the wall from which it came out and went back into.
I'm also ad hoc ruling that you don't have to make saves against its Babble ability right now.
Status
Kushnak: 0 damage; longstrider; bull's strength, 39 rounds
Eskard: 2 damage
Bazrim: 2 damage; mage armor
Erdolliel: 0 damage
Nethezar: 0 damage
Party: bless, 38 rounds[/sblock]