Dragon Armies 17 Rats in the Walls

So our illustrious ranger puts his clever plan into action. Five drow guards prove no match for our party. After the raid the party returns to the hidey hole to celebrate. Two hours later the drow outpost is manned by 10 guards. The party returns to attack again. However this time as the guards are being overwhelmed, one of them puts a horn to his lips and sounds the alarm. As they retreat towards the hidey hole they are peppered by crossbow bolts from the permanent darkness area that covers their escape route. They charge into the darkness only to be bushwhacked by a black dragon exterminator. A desperate melee ensues. However eventually the party gains the upper hand and retreats to the hidey hole to celebrate again. The next day the dwarves spying on the main chamber report the arrival of a small blue goblin with a flute accompanied by a eight foot tall insectiod creature with powerful forearms and a weird set of four eyes (umber hulk). Once again the party sallies forth, at which point a force of 30 drow led by a priestess of Loth attacks immediately from the darkness. As they battle this set of foes they are charged from behind by drow spider knights. The party eventually turns the tide against the drow at which point the spider knights grab the fallen body of the priestess of Loth and race off to the south. The party decides not to pursue, but retreat to their hidey hole. As they retreat they hear a loud thump as the drow reinforcements trigger the block trap in the drowstopper secret door. However, whats this? To their horror they hear the sound of claws scrapping on stone as the umber hulk begins breaking through the stone block. The party rushes back to defend the secret entrance. As they begin their battle with the umber hulk, the little blue goblin blows a shrill note on his flute and disappears. Eventually the umber hulk is slain, and the drow warriors are dispersed, but what happened to the little blue goblin? As the party starts back the hobbit in the lead has to nimbly dodge a backup block trap which comes thundering down to block their retreat. Slowly the awful truth of where the little blue goblin is dawns on them. More next time (hopefully a lot sooner than last times 6 week gap).