1 - The missing villagers of Tar

Sedror, your taunt seem to have worked as the first spiders emerging from the tunnel jump on you, followed by lot more of them. You feel them crawling all over your legs as they cover you entirely, chewing through your magical protection one bite at a time.

Sorry for the delay, my vacations are almost over. This is a very large number of spiders ranging from the size of a thumb to the size of a hand. There's easily a hundred of them. If this information changes what you want to do, you can change it : in that case, edit your previous post and cross what you won't do, then add what you'll do instead.
Then, we'll move forward.

Sedror, you manage to cast your spell while shaking most of the spiders from your upper body and feel its reassuring protection around you as more of them attempt to climb you again.

Tianni, your shield attack is pretty effective, smashing several spiders against the wall in a delightful crack.

Bard, do you want to change your action or do we proceed with the one described?

I have now edited my action.

You all get surprised by the violence and speed at which the spiders are coming. Bug, who just woke up from a rather long lethargy, can't figure out what to do other than encouraging his companions ; Sedror, who initially was pretty confident, now looks less enthusiastic about the incoming swarm ; Tianni was quick enough to smash some spiders on the wall before they can dodge the attack.
But now, the tunnel is completely covered with spiders and they start jumping at you.

Mee'haïl, as your companions face the enemies that came after you in the burning tunnel, you notice spiders coming from your left, in the rocky path on your left (the one that goes east).

Mee'haï charges to join his companions and try to completely block the entrance from the tunnel from where spiders are coming.
The handaxe attack connects and kills some spiders, but if feels inefficient compared to what's coming. It might be worth considering another approach than trying to hack through them faster than they eat you.

Anyway, as you attempt to contain the incoming wave with your weapons and bodies, you slowly get covered by spiders. However, they are not as deadly as you might expect. And even if you are now almost covered with black fur and legs, it looks like they are having a hard time going any further or even finding an opening in your defenses to bite you.

Bug, while your saviors and the strange dwarf are struggling to contain the swarm of spiders coming from the south, you notice that another one is approaching from the east, crawling all over the large stones that stand on that path. They are not inside your cave yet, though.