The neanderthal army, spurred on by their charismatic king, rushed into battle with the rat-folk in the cavern with bridges over the lava flow.
The rats had prepared their defenses with a foul fish guts liquid that could burn as oil, many of the neanderthals were burned and stabbed, and the rats attempted to out flank us using a secret door, but as we had deprived them of their leader, they fought a wasted battle.
In the midst, several rats threw their spears at my poor thief, who lost her footing and plunged into the lava below, we applied the vengeance of Mar Nod and slaughtered the remainder as the neanderthal king massacred the other rats.
We met in the erstwhile chamber of the rat-folk, where they had prepared a victory brew, which the neanderthals started to imbibe, and some fish gut oil which we fashioned some more bombs with, as the king drank to his victory, we briefly rested and pushed on hoping to find our way out.
After a short while we encountered a room of darkness, our new cleric comrade brazenly charged into the blackness, forcing me to invest the power of Mar Nod to enlighten the room (and the cleric's foolishness), whereupon we found a skeleton and some potions and scrolls.
Onwards and outwards.