Some rooms in Blue Prince are more rare than others. While there will be ones that you will repeatedly encounter on nearly every run, other rooms may not show up for several days if you're unlucky.

Room 8 is a room in Blue Prince that you can only unlock with Key 8 on rank 8. You’ll find that key by solving the Gallery puzzle(s). In Room 8, you’ll have to puzzle out clues on eight animal statues ...