It's spine-chilling enough to find out that the mystery scratches on the walls of the basement of your newly-purchased home were not caused by a dog as you previously
thought hoped. Now you must move forward with the mindset that the horrible scratches were caused by human fingernails, which is
awful because why would someone scratch the walls unless they were in distress? Another theory is that they were caused by a paranormal entity, which is also horrendous because... well, no explanation needed there. Although concerned about whatever happened in the past, you would be able to reasonably move on with your life if nothing new happened. But seeing that the scratches had dramatically multiplied - enough to tell the new ones apart from the old ones - means that you've just inherited a massive problem in your lovely new home. And it's nothing that an exterminator can take care of for you.