What is needed are the brave, or not so brave, to enter the sewers. They can be anything that can be sensibly found in Pelargir in the early years of the fourth age who can fit in tunnels under a city, so no ents, trolls or magically intelligent Mumakil.
The tunnels and sewers are big enough to move around in, say four foot to ten foot wide at need, with rooms, tunnels and maybe even a series of underground canals! They may be dark, but could be lit if people are living in there.
If you want to take part, please feel free to ask, give a bio for your character and let me know what you plan to take in there.
I do have a couple of points worthy of note though;
• Please remember where you will be writing. You cannot use a longbow in a four foot circumference tunnel, nor can you see far enough to shoot.
• Similarly, an elven longsword forged in Gondolin and six foot long cannot be swung in sewers. There is a reason orcs like long knives

• You will need a light source, even if you are an elf, orc or dwarf. It makes it more realistic.
• Realism is important in good writing, so are flawed characters. They make much more interesting writing.
• Please do not ask to write the Wose himself. The son of Ghân-buri-Ghân, who at this time has no name because the Gondorians haven’t bothered to learn it, remains in the remit of the thread owner.