I really can't think of anything too horrible for someone who could slowly suffocate a dog.
Especially as dogs are so much superior in pretty much everyway to humans.
I don't know what your basement is like, but i'm guessing something on the lines of pit of anguish, or hole of desolation and despair.
I hope i'm on the right lines here.
Isn't it odd how the self professed sanctimonous, self righteous are often actually the most morally contemptible? It's almost as if they feel excused to commit acts others can't by their evident righteousness.
Give me honest evil to that brand of hypocrisy any day.