Duskmourn

Duskmourn is a modern-looking world, including electronics like television sets, mechanical devices like chainsaws, and 80's style fashion like sneakers. The entire plane was engulfed in an endless haunted mansion filled with horrors. 

The House is no ordinary building; it's a living, plane-spanning entity that thrives on the fear of its inhabitants. The House is the world, and the world is the House. Its rooms are constantly shifting, changing more significantly when not observed. Sometimes there seem to be outside environments, but there is always a door or window leading to the next room. The moths that are the symbol of Valgavoth appear everywhere. Each moth has multiple eyespots on their wings, functioning as the eyes of the house. 

If you can see a moth, the house can see you.