As the group cautiously creeps forward, Babette & Metrius here a slight skritching sound coming from some of the smaller side openings. Metrius calls out, "I think I see something back here," just before chaos erupts.
Tor spots movement in one of the small feeder tunnels on his right. Turning that direction he sees a spider just inside the opening, staring at him hungrily.
ooc: Just so I have everything straight, Gideon has his silver longsword in one hand and a torch in the other, Tor has his silver scimitar in one hand and a sunrod in the other, Babette has a dagger in her hand and has Mage Armor up, Fimble is unarmed and Metrius has his mace out.
Tor, you have first action. The opening is approx. 2 ft. in diameter and the spider seems to be filling it all, about a foot from the edge. View map here.