I envisioned their movement through solid materials as more supernatural than mechanical - they pass through the materials as if they were soft and pliable to them. As such, I didn't put much thought into their castings. The sub was inspired by a fishing trip with my son as I was baiting the hook.
As for immunity/resistance to poisons, I believed I covered that off with the passage:
"They are not indestructible, but are able to survive within the earth to the depths of several miles, subject to the immense pressures, temperatures and the toxicity of both air and stone"
So, metals, acids, CO, CO2, H2SO, etc, are all found in the depths, so all inorganic poisons and simple organic poisons would be protected
The title is a people's name for the things - they are effectively immortal. Another piece of somewhat dangerous, somewhat odd, magic to throw in one's world, not unlike the Voracious Slug.
Go to CommentA small group of men stares intensely at something. Coming nearer, you see puppies, obviously still young, as they are small and only learn to walk. Cute as they are, the men look serious and exchange a comment here and there, making their mother nervous. But one man keeps her somewhat calm, while looking with others on the little ones.
The puppies are a completely new dog breed. The breeder hopes for better characteristics, the other men are mostly hunters and other dog-fanciers, that were called or came from own interest. If all looks well, they will have business. But now, they are just watching.
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Dungeons (Swamp) (Puzzles)