As the group stands discussing the issue, Lucas extends his awareness down the pit 50 paces or so beyond their position.
Spoiler for Lord Raven:
[sblock]The shaft goes straight down about 50 feet and widens into what looks like a natural chamber. When you move the arcane eye down into it, you see that the chamber is about 30 feet wide and has no apparent exits. The floor of the chamber is covered with a slimy layer of filth. Apparently this is some sort of toilet/trash can. Even from your current position you're getting a faint whiff of it. Once you get closer the smell should be remarkable.[/sblock]
Just as he is about to relate what he has seen, Donnybrook's finely-tuned senses again alert everyone to danger. A faint scuttling quickly rises until you all clearly hear a flurry of scraping stone. Something big is coming toward you fast.
Due to Donnybrook's inhumanly high Spot and Listen modifiers he can shout a warning which will prevent the approaching attacker from getting a surprise round. The creature starts this round just outside darkvision range, approaching from the far side of the web sheet off to the left (North), coming from the adjacent chamber I mentioned Lucas seeing earlier.
Initiatives:
Donnybrook: 15+4=19
Lucas: 11+6=17
Unknown Thing: 15
Girble: 7+5=12
Erethinol: 4+4=8
Sirius: 1+1=2
Actions?