Well, for the same reason it would be a bad idea for a physical being to walk up to a Bull and try to yank off one of their testicles.
Let me get this straight though. On level three, youcan do anything that a mundane can do on the mundane plane. With the added benefit of being able to fly, pass through stone, breath underwater, and so forth. and the down side is? If you die, we mundanes get attacked by monsters.
Well yeah, in general monsters don't appreciate it when you try to forcefully separate their balls, but that also counts for any of you shooting or stabbing it (as difficult as the latter might be). Nobody else seems very eager to engage it, but I doubt it'll be content just hanging around in the air to chill out and not bother us.
If anything, the fact that I cannot touch it in the deep might indicate it also can't hurt me back in this state, so with
some heaps of luck I'll get in a few hits unopposed.
I'd try forming an edge or something at 3, on the off-chance, but it looks like this might work.
What do you mean exactly by 'forming an edge'? Grab something sharp to stab it?
I'm pretty sure that heavy thing (or the chests) may be good enough to contain things or be made of strong stuff. I'm thinking of taking a wall section out so we could just sling boxes back to the bore, instead of moving them over the hole.
You could use the diving bell to gather large pieces of loot in and bring it up. Slinging things into the bore might be difficult given it's still at the top of the cave.