Oh, it was quite hospitable for life - mine, specifically.
Though, unlike small creatures such as fish, I do not require fresh air and warmth.

[Because of course they lived in a cursed ass castle. They even shared it with vampires.
And a giant spider monster made of eyes and hair.
The sweet life, as it were.]

... Hmm. With your experiences, I cannot help but wonder...
Would you, perhaps, be able to hear it speak?

A shame it cannot be tested. I think you would have enjoyed the castle to some degree.