[since I haven't heard about Zig, he will remain back in the previous room covering the rear]
Four arrows fly from dark areas of this natural passage. Melvos, in the lead, is struck by an arrow, which hits a tender spot, doing some significant damage. However the pain of the arrow feels like nothing compared to the mockery of a fair lady [since you haven't taken the superpowers off the character yet, I figured I'd exploit the weakness while it's still there, the super con bonus is negated]
Bruk is the target is two arrows, but one glances off his tough hide. Yet the other finds a weak spot and causes serious pain.
Valjean, at th last moment sees an arrow streaking for him, and deflects it with his shield (or maybe it just happened to hit his shield, Valjean swears that the former is correct)
The pack of dire rats was waiting on the other side of the barrier, and swarms over those who have crossed it attacking Melvos, Bruk and Valjean. Melvos and Valjean are bit twice, and Bruk is bit once.
The area you have entered is a 20' wide passage which leads to some stairs to the west. Some cracks in the wall lead to the north and south. It is about 40 to the stairs.
buzzard