Hello.
In a current adventure my players have 'found' a long abandonded Derro structure.
Within are some empty map rooms myself, as a thoughtful DM, feel would make excellent lab spaces where the former Derro genius can be properly appreciated by my players.
So, just some names/ideas for seven or so rooms.
Perhaps some rooms where the Derro were seeking mysteries/secrets/knowledg of 'Why' good creatures are 'good' or even vice a versa, why some bad creatures are 'bad'?
Edit: Oh.... character level is approximately third to fourth.
Though, realy, more a 'guide line' for ideas.
Much cheers, thanks and twisted best wishes. (^_^)