Fil Gashan is the barracks and training grounds of the Orcs in Moria. Within those walls, a fearsome general has been readying his troops for an assault upon the Elves of Lothlórien to the east of Khazad-dûm. Brogur and Bósi's dwarves, wishing to reclaim Moria, aim to prevent this at any cost, for they would see the Elves and dwarves reinstate old alliances for the good of both.
'Word of your renown has spread far and wide throughout these long tunnels, ${CLASS}. Aye, don't be modest -- I can see in your eyes the bright look of a valiant adventurer. I would know your ilk even without reinforcement from the rumours.
'Are you up for a small challenge? South-west of the Twenty-first Hall, the forces of Fil Gashan are plotting an assault against our Elf-neighbours in Lothlórien, and this must not be allowed to come about. We are doing all that we can to stop them, but I bet you would like to be involved, outsider though you are.
'An adventurer such as yourself would look forward to a little dare such as the one I am about to propose: go into Fil Gashan and slay as many Orcs as you can. They are many; ever do their numbers swell, and ever does their threat increase.'
Fil Gashan is south-west of the Twenty-first Hall.
The dwarf Geirr has challenged you to make your way into Fil Gashan and defeat many Orcs therein.
The dwarf Geirr is in the Twenty-first hall, north-east of Fil Gashan
Geirr will wish to hear if you have been brave enough to enter Fil Gashan and face the Orcs in battle.