1 - The missing villagers of Tar

Tianni walks in first and takes a few seconds to get accustomed to the darkness. Thanks to her darkvision, she can see further in the mine than any of you.

After a short corridor (maybe 20 feet), four large stairs made of volcanic rock go down into the mine. Getting the ore in and out would have been easier without stairs, but this entrance was not made in the sole purpose of getting in and out : the engraved walls, the finely cut stone slabs, the copper gliding... This was made to show off. They must have been proud of this mine, because after centuries this entrance still looks better that your average human city.
Down the stairs, you see what's left of the rails that looters didn't take yet. Because of them, it doesn't look like there is much left in there but cobwebs on the walls, ceiling and some parts of the floor. Lots of them, actually, dusty and disgusting.

This... hall is big, large enough to have people unloading mine carts, trading and carrying their goods out. Due to its size and the low lighting, you can't see clearly the end of it. It looks like there is regular passage here toward the north and west, and you hear strange faint noise echoing in the mine. It is irregular enough so that you know it is made by a a living thing...

I'll wait until you guys either start moving or declare some actions.

As you get down the stairs, can see that the missing parts for the dwarven rails have been taken, probably by looters : it is near the entrance and metal is worth some money if you can sell it.
You can also see a room on each side of the entrance with worked walls and elegant stone slabs. The one on the left has a big stone table that could not be moved by less than a full bastion of dwarves, and some broken wooden furniture scraps. In the far corner, there also is a big pile of something -probably barrels and casks- covered in cobwebs.

Upon close investigation, Tianna can't find any kind of device that would cause you harm. She does, however, notice a strange translucent kind of rope. A tight rope that goes from deeper in the tunnel to some kind of small hole (maybe 15 inch) in the ceiling.
As you get closer to the tunnel, you are now all able to here the noise coming from that way and you begin to notice something that smells like rotting meat.
Being closer to the tunnel also let you determine that the noise comes from several creatures, probably some kind of animals. They shriek and seem too be fighting over something, which might explain why they didn't notice you yet...

Mee'haīl, thanks to your knowledge of nature, you can tell that they sound like insects or something of the kind. And if Tianna shows you the weird looking rope, you would be able to confirm that it looks... insect-produced. And while you inspect it, you can see at times very low vibrations of said rope.

It is about 2 inches wide, so it's unlikely that he ever saw something like it. But giant spiders sometimes make webs in the Great Forest, and it does indeed look like an enlarged version of a single spiderweb string.

Tianna and Mee'haïl take the lead and march forward, alert to any danger. As you advance in the tunnel, the walls get narrower and less worked out. They start to be covered with cobwebs, old and fresh ones, that seem to concentrate in a passage on your left.
She spots it first, in the middle of the webs, just a split second before the light from the torch reaches it : a wolf-sized creature with two long arms-looking legs, two very thin ones and large eyes that reflects the light from your torch.Tianna, you can take an bonus action or reaction right now! Then the creature will notice the incoming light, will shrill a loud cry and we will roll for initiative.