1 - The missing villagers of Tar

Just as Sedror disappears in the hole he just came from, spiders charge from both path in a ravenous attack.
At the southern entrance they do so by attempting once again to cover and munch what they can of you three, while at the eastern entrance they slowly and apparently clumsily advance in the room.
Edit: my bad, I rolled an attack against Sedror but he isn't facing the spiders anymore. Just ignore it (too bad, it was the only attack to connect ;) )

The axe attack seems to be pretty ineffective, passing through the spiders while only killing a few. They reply by climbing on the axe's handle and biting your hand, probably so that you let it go. Tianni, some of them got into your armor and attempt to take advantage of that situation.
Bug, from where you are standing it is now clear that the spiders are reluctant to even walk in here and when they do they do their best to stay off the ground and walls.
Sedror, you are now in a dusty tunnel with gravels and small copper ore bits on the ground. The ground is somewhat moist, barely enough to even feel it. Battle is still raging in the cave behind you. And that tunnel, like said before, goes up with random turns that make it impossible to see more than 20 feet away.

Mee'haïl, as Tianni and Bug disappear in the tunnel, you are now left alone in a room that starts to get overrun by spiders. They shriek and jump everywhere, visibly uncomfortable with what they have to go through to catch the intruders. If you want to join the rest of the team, you'll have to walk on them (which is a difficult terrain, so half your speed rounded down). Or come up with a brilliant idea of some kind. What do you do?

Crossing the room is hard even for you Mee'haïl, with all the spiders they try their best to jump on you while doing their best to stay out of the ground. None of them even tried to climb on the walls or ceiling, which is pretty unusual for spiders as far as you can tell.
Anyway, you manage to reach the tunnel and lower to follow your companions, keeping your enemies away with your ax and blocking the way with your shield. As long as you stay in that position and walk backward in a crouched position, few spiders should be able to go passed you. But you'll have to figure how to lower your shield at some point...

So you end up packed in that narrow tunnel with Sedror leading and Mee'haïl protecting your back. Spiders will certainly follow you, but they have little room to reach you as you slash and smash them: we'll consider that you take damage here and there, but not much.So what do you guys want to do now that you are here? There isn't much choice for the way to go, but you have some time to plan or think of something...

Despite Mee'haïl's efforts to contain them, some spiders slip through his guard and attack him. Fighting in such a small tunnel makes it really hard for you to dodge incoming attacks. But, alert as he is, Mee'haïl stops the spiders mid-way with a deadly hit.